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If you choose the Boolean match option, then you can enter a full boolean expression in the search field. However, the expression must be valid in order for the search to proceed.
A boolean expression can include operands such as not, and, or and parentheses. The result will be one set of matches.
Note, the operator not is used as the word "without" and is binary. Therefore, you can not write "cat and not dog" or just "not dog," but you can write "cat not dog".
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