Here you can see the two drop-down menus that appear on the Advanced Search screen, expanded to show all the options they offer. You can set your search to any of the criteria below, and even mix and match options. For example, you can do a Subject search with has all of these words, or has this exact phrase, or has at least one of these words, or has none of these words.
You want to be careful which options you select. Doing a search that ONLY says has none of these words will result in seeing EVERYTHING ELSE THE LIBRARY HAS!! And the library has a LOT of materials!