China National Knowledge Infrastructure has a search word association function.
1. Abandon simple search and use professional search or advanced search.
2. The functions of professional search and advanced search are much more powerful than simple search. In the search criteria column, enter subject words, keywords, authors and units according to your needs (pay attention to the authoritativeness of the article), Precise searches can be carried out based on search criteria such as publication time (focusing on the timeliness of documents), funding, document sources, etc., which can realize our functions more effectively.
3. There are also sentence retrieval and associative retrieval. Select sentence retrieval and type in two keywords. Then, a sentence or a paragraph containing both keywords will be retrieved; associative retrieval, both This includes understanding the keywords that are similar to this topic, as well as understanding the academic masters in these fields.