Searching for key words
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Searching for keywords is used as the basic functionality to search in large collections of documents, including the web. A user specifies keywords and the search engine tries to find the documents that best matches these keywords. In addion to keywords also often the boolean terms AND, OR and NOT can be used to further specify the search query. Boolean search is supported by most search engines. An advanced feature is proximity search, which allows you to define the distance between keywords.