Search Modes: with ALL of the words: returns hits that CONTAIN all of the query words in any order. with EXACT PHRASE only:returns hits that CONTAIN the exact query phrase. matching REGULAR EXPRESSION: returns hits that contain the query words, even as a substring. For example, if searching on phosphate, bisphosphate would match. with ANY of the words:returns hits to any word in the query phrase. with the EXACT PHRASE ONLY:returns only those hits that exactly MATCH the query phrase. Additional search options (Extended Searches only): != : returns hits that do NOT MATCH query phrase. with no value: returns hits for which the selected field of a given class has no value. For example, a search on Reactions for which the field CatalystActivity has no value will return all reactions that don’t involve catalysts. with any value: returns hits for which the selected field of a given Class has any value (not zero or blank).