Keyword searches look for the words you provide, in any order, and in any text available in the database it's searching.
Think about what you need to find, and select the most important terms:
You can enter in your keywords in the search box for Summon, CONSORT, or your database of choice. Here's a Summon keyword search:
You can also put names or phrases in quotation marks to search for that phrase -- those precise words, in that order -- in the catalog or database: