Look for the Discipline and Subject Terms features on the Summon results page to help focus the materials that you see.
Main search page Search Options, Apply Equivalent Subjects + Apply Related Words + Also Search Within Full text of articles
From main search box, enter search term(s) from search results page, left side options scroll down to Research Area, select all that apply
Once you enter any search term, you'll see the basic search results page, which includes an option to do a Credo Advanced Search Limit Your Search Results to... Select Subjects or Titles