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Query Language

You can increase the accuracy of your searches by adding operators that fine-tune your keywords. These include OR, +, -, ~, and double quotation marks. For example:

information OR retrieval
finds documents containing 'information' or 'retrieval'

information +retrieval
finds documents containing both 'information' and 'retrieval'

information -retrieval
finds documents containing 'information' but not 'retrieval'

~information ~retrieval
finds documents containing 'information' or 'retrieval' and their synonyms

"information retrieval"
finds documents containing the phrase 'information retrieval'