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:
finds pages containing 'terroristic' or 'threats'
terroristic or threats
same as above
terroristic and threats
finds pages containing both 'terroristic' and 'threats'
terroristic not threats
finds documents containing 'terroristic'' but not 'threats'
(terroristic not threats) and crimes
finds documents containing 'terroristic' plus 'crimes', but not 'threats'
finds documents containing words starting with 'terror'