You can use these tricks to help find the best results when searching.
Ask yourself the who, what, where, why questions and use the one/two word answers as your keywords!
AND combines, OR expands, NOT eliminates. Add them to your search to get more or less results! (Ex. helpful with synonyms (attorney OR lawyer) or getting rid of something unwanted - court NOT supreme)
Cut a word off at the trunk and let it branch out during the search! (Ex. criminology = crim* and gets results of crime, criminal, criminology, etc.).
Put quotation marks around your search terms to keep them together. (Ex. "federal register" or "prison reform").
Use parentheses to put it all together in a nice little nest! ("united states" AND (statutes OR regulations))