Google Advanced Search can be useful for searching specific domains (.edu, .gov, etc.), file types (.pdf, .ppt, .xls, etc.), languages, etc. Unfortunately, Google has removed the Advanced Search link from their home page. You must now do an initial search and then click on the Tools symbol on the page of results.
A Google tool that limits your search to scholarly, academic or peer-reviewed articles.
For maximum benefit when off-campus:
Note: Google Scholar does NOT search all our databases.