Quotation marks produce an exact match of a word or phrase. Parenthesis help specify which words or phrases get read first. Some characters such as the backslash are reserved for special search functions. The period should be eliminated from a search, since the search engine will not recognize it, and thus produce an unsuccessful search result. Search for synonyms See the Advanced User Guidelines below for further information on the use of operators.
Some Boolean operators take precedence over other operators.
To further refine the order of precedence use 'nested' parentheses, where the innermost level is given highest precedence. Selects documents that include a phrase you specify. A phrase is a group of two or more words that occur in a specific order. Searches for documents that include all of the words you specify within a sentence. You can specify search elements in sequential or random order.