A multi-disciplinary database, such as Academic Search Complete in EbscoHost, is a good source for topics that don't fall easily into a subject catagory.
Other databases like LexisNexis Academic may use the same or different characters for stemming ( !, instead of *) or wild cards (* instead of ?). When searching a database unfamiliar to you, check the the "Help" section of the database to determine the search symbols for that database.
Search @UW has full text articles too.