Note: Boolean searches allow you to use "and" and "or" as operators, and to group them with parentheses. A boolean search "dog or cat" would return all results which contain either the word "dog" or the word "cat". You can also use parentheses to group combinations. A boolean search for "(dog or cat) and massage " would find all results which contain either "dog" or "cat", only so long as they also contain "massage".