Have faith and keep trucking. Sooner or later, it'll work out OK for you. The most powerful techniques, and you should always use it if possible. Nothing will increase the accuracy of the relevancy more than using phrases to search when appropriate. Not all web databases allow you to do Boolean searching.
Examples follow . . .
OR - The term OR is used to indicate a broader search. NOT - NOT can be used to exclude words. If you include a minus sign - before a search term or phrase, it means that the term should NOT be in sites that are returned. All rights reserved. Copyright notice pertains to all documents, files, pages, processes and text contained herein.