Medical Dictionary Search Engine

Operator	Description
`AND +`	Finds documents containing all of the specified words or phrases. Amino AND Acid finds documents with both the word amino and the word acid.
`OR &`	Finds documents containing at least one of the specified words or phrases. Amino OR Acid finds documents containing either amino or acid. The found documents could contain both items, but not necessarily.
`AND NOT + -`	Excludes documents containing the specified word or phrase. Amino AND NOT Acid finds documents with amino but not containing acid. NOT must be used with another operator, like AND. The search engine does not accept 'amino NOT acid'; instead, specify amino AND NOT acid.
`OR NOT & -`	Finds documents containing one of the specified words or phrases or not containing other words. Amino OR NOT Acid finds documents which contain Amino or not containing Acid
`" "`	Quotation marks are used to denote exact phrases. For example, a search on "Amino Acid" will match only documents containing the words as an exact phrase. It will not find pages with the words used in a different order, such as "Acid Amino"

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