Support the Search Terms Report is one of the most helpful utilities from Magento 2. The report will show the number of results as well as the number of times a term is used. Moreover, any data will be stored and filtered by terms, stores, results, and hits. Export them as you need for further analysis.
Report > Marketing > Search Term.
Search Query, filter the search term for the report.
In addition to the Search Terms, I have a search tool for your inquiry, Magento 2 Advanced Search module from Mageplaza that certaintly helps improve the search engine ranking better and better.
Ref: Magento 2 User Guide
It comes to the end of tutorial: How to Report Search Terms in Magento 2.