The general steps of document retrieval: 1, analyze the problem and make clear the document demand; 2. Select literature retrieval tools; 3. Determine the search method and search terms; 4. Adjust the retrieval strategy; 5, according to the literature clues, get the full text.

Before literature retrieval, we should first make clear the fields of our thesis topics, such as law and industrial technology, basic science, medicine and health, agricultural science, education, literature and art, economy and finance, social science, philosophy, politics and law, etc.

Select a document retrieval tool:

There are many literature retrieval tools, and different categories have different uses of literature. Below I will introduce the main literature types and their representative retrieval tools.

Books and periodicals: CNKI, VIP, Wanfang, EBSCO, Springer LINK and other periodical databases.

Patents: Wanfang, China National Intellectual Property Administration, China, European Patent Office database, US Patent and Trademark Office database.

Standard documents: Wanfang, China Standard Service Network, ISO and IEC websites.

Scientific and Technological Reports: China Scientific and Technological Achievements Database, National Science and Technology Library, American Government Research Center, etc.

Conference papers: CNKI, Wanfang, National Science and Technology Library, ISTP, China Conference Network and other conference papers.

Database dissertations: dissertations of CNKI, Wanfang, National Science and Technology Library, PQDT, etc.