| 调查 | diào chá | investigation / inquiry / to investigate / to survey / survey / (opinion) poll / CL:項|项[xiang4],個|个[ge4] |   |
| 调研 | diào yán | to investigate and research / research / investigation | |
| 调查核实 | diào chá hé shí | to investigate / investigation / fact-checking | |
| 考察 | kǎo chá | to inspect / to observe and study / on-the-spot investigation | |
| 视察 | shì chá | to inspect / an investigation | |
| 调查报告 | diào chá bào gào | memoir / investigation report | |
| 普查 | pǔ chá | census / general survey / general investigation / reconnaissance survey | |
| 调查结果 | diào chá jié guǒ | results (of an investigation, poll) | |
| 进行调查 | jìn xíng diào chá | to carry out an investigation | |
| 检察官 | jiǎn chá guān | public prosecutor / public procurator (judicial officer whose job may involve both criminal investigation and public prosecution) | |
| 出访 | chū fǎng | to go and visit in an official capacity or for investigation | |
| 专案组 | zhuān àn zǔ | special investigation team (legal or judicial) | |
| 刑侦 | xíng zhēn | criminal investigation | |
| 经查 | jīng chá | upon investigation | |
| 联邦调查局 | Lián bāng Diào chá jú | Federal Bureau of Investigation (FBI) | |
| 深究 | shēn jiū | to perform an in-depth investigation | |
| 取保候审 | qǔ bǎo hòu shěn | release from custody, subject to provision of a surety, pending investigation (PRC) | |
| 政审 | zhèng shěn | examine sb's political record / political investigation | |
| 考察队 | kǎo chá duì | investigation team / scientific expedition | |
| 抽丝剥茧 | chōu sī bāo jiǎn | lit. to spin silk from cocoons / fig. to make a painstaking investigation (idiom) | |
| 极深研几 | jí shēn yán jǐ | deep and detailed investigation (idiom) | |
| 调查处 | | Investigation Branch | |
| 本底调查 | běn dǐ diào chá | background investigation | |
| 侦讯 | zhēn xùn | to interrogate during investigation | |
| 刑事局 | Xíng shì jú | Criminal Investigation Bureau (CIB) | |
| 刑事警察局 | Xíng shì Jǐng chá jú | Criminal Investigation Bureau | |
| 待考 | dài kǎo | under investigation / currently unknown | |
| 现场调查 | xiàn chǎng diào chá | on-the-spot investigation | |
| 突击检查 | tū jī jiǎn chá | sudden unannounced investigation / on-the-spot inspection / to search without notification | |
| 特侦组 | tè zhēn zǔ | special investigation team (Tw) | |
| 联合调查队 | | Joint Investigation Team | |
| 特别调查股 | | Special Investigation Unit | |
| 金融调查股 | | financial investigation unit | |
| 战争罪调查股 | | War Crimes Investigation Unit | |
| 船舶事故和事件调查规则 | | Code for the Investigation of Marine Casualties and Incidents | |
| 调查股 | | Investigation Unit | |
| 海关调查机构代表会议 | | Conference of Representatives of Customs Investigation Services | |
| 区域调查中心 | | regional investigation hub / regional hub | |
| 现场调查队 | | Site Investigation Team | |
| 拉丁美洲国际移徙调查 | | Investigation of International Migration in Latin America | |
| 刑事侦查局 | | Criminal Investigation Department | |
| 远东区域调查小组 | | Far Eastern Regional Investigation Team | |
| 回溯跟踪调查 | | backtracking investigation | |
| 刑事侦察处 | | criminal investigative division / criminal investigation division / criminal investigative department | |
| 区域间调查洗钱技术课程 | | Interregional Investigation Techniques Course on Money-laundering | |
| 海关调查处 | | Customs Investigation Services | |
| 国际独立调查委员会 | | International Independent Investigation Commission | |
| 国家调查保护局 | | State Investigation and Protection Agency | |
| 刑事调查司 | | Criminal Investigation Division | |
| 非法团体和秘密安全机构调查委员会 | | Commission for the Investigation of Illegal Groups and Clandestine Security Structures | |
| 南极海洋系统和族类生物调查 | | Biological Investigation of Marine Antarctic Systems and Stocks | |
| 重罪调查股 | | Serious Crime Investigation Unit | |
| 维持和平与法庭调查股 | | Peacekeeping and Tribunals Investigation Unit | |
| 全球海洋环境污染调查 | | Global Investigation of Pollution in the Marine Environment | |
| 战略调查队 | | Strategic Investigation Team | |
| 国家研究和调查中心 | | National Research and Investigation Centre | |
| 伊斯坦布尔议定书 | yī sī tǎn bù ěr yì dìng shū | Manual on Effective Investigation and Documentation of Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment / Istanbul Protocol | |
| 事故调查规则 | | Code of International Standards and Recommended Practices for a Safety Investigation into a Marine Casualty or Marine Incident / Casualty Investigation Code | |
| 调查队队长 | | Investigation Team Leader | |
| 采购调查 | | procurement investigation | |
| 国家调查局 | | National Bureau of Investigation | |
| 检查和调查办公室 | | Office of Inspection and Investigation | |
| 性犯罪调查干事 | | Gender-based Crimes Investigation Officer | |
| 重罪调查小组 | | Serious Crimes Investigation Team | |
| 海洋科学调查的法律问题工作组 | | Working Group on Legal Questions related to Scientific Investigation of the Oceans | |
| 调查技巧 | | investigation techniques | |
| 调查办事员 | | Investigation Clerk | |
| 国际辐射研究卫星 | | International Radiation Investigation Satellite | |
| 欧亚岩石圈动态调查 | | Investigation of the Dynamics of the Euro-Asian Lithosphere | |
| 打击洗钱特别调查委员会 | | Special Investigation Commission for Fighting Money Laundering | |
| 调查和研究部 | | Department of Investigation and Research | |
| 特别调查队 | | Special Investigation Team | |
| 机构间调查小组 | | Interinstitutional Investigation Group | |
| 调查和起诉委员会 | | Commission for Investigation and Prosecution | |
| 轻微事故调查单位 | | minor investigation element | |
| 全球海洋环境污染调查工作委员会 | | Working Committee for the Global Investigation of Pollution in the Marine Environment | |
| 全球海洋环境污染调查国际协调小组 | | International Coordination Group for the Global Investigation of Pollution in the Marine Environment | |
| 联合调查小组 | | Joint Investigation Team (MONUC) | |
| 调查海盗和武装抢劫船舶罪行实用规则 | | Code of Practice for the Investigation of the Crimes of Piracy and Armed Robbery against Ships | |
| 司法调查委员会 | | Judicial Investigation Committee | |
| 联合特别调查股 | | Joint Special Investigation Unit | |
| 联合国阿富汗调查队 | | United Nations Investigation Team for Afghanistan | |
| 事故调查和预防科 | | Accident Investigation and Prevention Section | |
| 调查有政治动机非法武装团体联合小组 | | Joint Group for the Investigation of Politically Motivated Illegal Armed Groups | |
| 特别调查科 | | special investigation section / special investigation service / special investigation branch | |
| 联合国国际独立调查委员会专员 | | Commissioner of the United Nations International Independent Investigation Commission / Commissioner of the UN International Independent Investigation Commission | |
| 议会调查和稽核委员会 | | Parliamentary Investigation and Audit Commission | |
| 犯罪行为调查委员会 | | Commission for the Investigation of Criminal Acts | |
| 飞机事故调查标准 | | Standards on Aircraft Accident Investigation | |
| 联合国希腊边界事件调查委员会 | | United Nations Commission of Investigation concerning Greek Frontier Incidents | |
| 机构间调查委员会 | | Interinstitutional Investigation Commission | |
| 调查和起诉主要战犯委员会 | | Committee for the Investigation and Prosecution of Major War Criminals | |
| 刑事调查官 | | criminal investigation officer | |
| 迹证 | jì zhèng | (Tw) traces / material evidence (archaeology, criminal investigation etc) | |
| 立案侦查 | lì àn zhēn chá | to file for investigation / to prosecute (a case) | |
| 检警调 | jiǎn jǐng diào | (Tw) public prosecutors, the police, and the Investigation Bureau (abbr. for 檢察官、警察、調查局|检察官、警察、调查局[jian3 cha2 guan1 , jing3 cha2 , diao4 cha2 ju2]) | |
| 经侦 | jīng zhēn | economic crime investigation | |
| 拔出萝卜带出泥 | bá chū luó bo dài chū ní | lit. when you pull a radish out of the ground, some dirt comes up with it (idiom) / fig. to uncover, during the investigation of a crime, evidence of other crimes / to cause further problems while working on a problem | |
| 鉴证 | jiàn zhèng | appraisal / verification / authentication / forensic investigation | |
