Google introduced a new advanced search feature today that allows users to search not only for a particular keyword, but also for its synonyms. To use this feature, just place a ~ character directly in front of the relevant keyword in the search box. For example, a search for "happ ~genealogy" would not only bring up sites that include 'happ and genealogy," but also "happ and family tree," "happ and family history," and even "happ and surname." Try it for yourself!

Related Resource:
More Google Search Tips for Genealogists