Searching is case-insensitive using one or more search words. Quotes around the search words are unnecessary. You can use the boolean conjunctions and , or , or not in searching. Without these, the search system assumes you want to and the words together.
Evaluation normally takes place from left to right.
You can use parentheses for a different order of evaluation. This search will also be evaluated from left to right, although the operation in parentheses will be evaluated as a whole first.