Most databases (including Novanet and Google) use boolean operators, truncation, proximity searching, etc. enabling the searcher to create search strategies. This comprehensive guide shares details on search operators, using wildcards or truncation, and much, much more.
Use a database's HELP section (usually upper, right) to learn particulars about a database's search functions.
Lynn Kysh, MLIS
Information Services Librarian
University of Southern California