Using Our Search Engine - The text search engine allows queries to be formed from arbitrary expressions containing the keywords AND, OR, and NOT, and grouped with parentheses. For example: automobile accident
finds pages containing 'automobile' or 'accident'
automobile or accident
same as above
accident and automobile
finds pages containing both 'accident' and 'automobile'
automobile not accident
finds documents containing 'automobile'' but not 'accident'
(automobile not accident) and insurance
finds documents containing 'automobile' plus 'insurance', but not 'accident'
auto*
finds documents containing words starting with 'auto'