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aids/AIDS
Type your query in uppercase or lowercase--it doesn't
matter. Changing the case of the letters in your query
will not affect search results in any way. EXAMPLE:
If your query is AIDS, you can type
aids and get the same search results.
aid*
Special
characters have no impact on your search, with the exception
of the asterisk, *. The *
indicates a wildcard search.
Typing
your query in natural language is a great way to get
specific information. EXAMPLE: If you type what
is the third longest river in the world? ,
results that contain the most occurrences of the words
"third," "longest," "river,"
and "world" will be returned. These results
are ranked according to the number of times the keywords
appear.