Nn specifies the words must occur within n words in any order . Wildcards are characters that can be used to broaden your searches by finding variations of a word . If you use more than one operator in your search expression, they will work in a specific order . Using parentheses can change this order. If parentheses are used the system does the search within the parentheses first, them combines this result with the search terms that are outside the parentheses.
Several terms can inadvertently cause problems in searches.
If you need more information consult the help available through Infotrac, or ask a Reference Librarian.