1. Add double quotation marks before and after the sentence to be searched, so that Google Academic can search completely. For example, put this sentence in double quotation marks and put it into Google academic search, and found this document accurately.
2. Search related literature through the library, mainly professional books.
3.CNKI (hownet) view. If your school cooperates with HowNet, you can download the literature for free. HowNet is more convenient to find professional literature than the library, and you can view journals or master's and doctoral dissertations.
4. Pass Baidu Academic: Just enter keywords.