Search for: Records that have the search term anywhere within them.
Volume: Depending on the terms you use, searches may retrieve no results or thousands. Searches with general terms often return many results..
Relevance: Varies. Results may be completely unrelated to your topic. For example, a search for 'Philadelphia' returns records for every book published by the University of Pennsylvania Press (located in 'Philadelphia') regardless of whether the work is about Philadelphia.
Flexibility: High: Terms can be combined in complex ways to design effective searches.