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- AND / OR
- Use AND and OR for logical expressions.
- ( ... )
- Use parentheses to group search terms.
- " ... "
- Use quotation marks for compound phrases.
- + ...
- Plus marks a word as necessary.
- - ...
- Minus marks a word as not wanted.
- From / To
- Enter dates on the form YYYY, YYYY-MM or YYYY-MM-DD.