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Tips for Searching
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When you enter text in a search box on this
Web site, the default search is for an exact match for the
text you entered.
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Search results are ranked in order of
relevance. Factors include the number of times the search
term appears in the document, the number of words in the document,
and, if you use the search methods listed below, how close the
words are together.
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To broaden your search, or if you want to enter
queries using natural language, check the box that says Use Free Text
Query
With free text queries, you can
enter any text you want, from a proper question, to a string of
words and phrases. Note that when you're using free text
queries, the regular query language features are disabled and
keywords such as AND, OR, and
NEAR are interpreted as normal words.
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You can use AND,
OR, NEAR, and AND
NOT to search for very specific combinations of
words and phrases. Put quotes around "search phrases" in
combinations.
For example:
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cancer AND surgery
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diabetes OR high blood pressure
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"cancer treatment" NEAR chemotherapy
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"heart disease" AND NOT "blood
pressure"
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You can also search for all forms of a word. For
example, in the form type sink** to find
sink, sinking, sank, and
sunk.
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