Narrow the search.

This method is the same as we usually use Baidu. The more search words, the less content you find. The fewer search words, the more content you find. For example, my graduation thesis is entitled "Topology and Properties in Taper Metric Space". If I type "taper metric space topology" in the search box, I can hardly find anything valuable. In fact, I will narrow down the scope and just type "metric space" to generate many articles, and then I will look for what I need in these articles.

Use more diverse search tools.

There are many tools that can be used to retrieve documents, such as China HowNet and Baidu Academic. In addition, there are Wan Fang Data, VIP and so on. There are also some professional databases, which are purchased by the school and can be used for free on the school website. Some school libraries also provide literature search function on their websites. Other foreign websites are also very useful, such as Google Academic, Elsevier, Springer and so on.

Try different search methods.

Search websites will provide many search methods, such as by topic, by article, by author and so on. , divided into precise search and fuzzy search. At the same time, the types of literature are also divided into periodicals, conferences, degrees and so on. In this way, we can conduct multi-party research on research topics and find relevant meetings, experts, professors, etc. , and then search in different ways, which can also expand the search volume.