Two Boolean operators that are key to find information are AND and OR. The AND is used to connect two different concepts and the OR is used between synonymous concepts. It is critical to put parentheses around a search expression that contains an OR. Here is an example:
The first part of this statement will find material about homeless adults or adolescents living on the street. The second part will look for the words "policy" or "policies". The AND then links the first set with the second. This may find information about polices addressing homelessness.
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