This is a pretty rudimentary search engine.

Boolean operators OR, AND, AND NOT, and BUT NOT are allowed, as is grouping of search terms using parentheses.

The simplest search, aside from a single word search, would be a list of words. These words are then ORed together for the search.

Here are some examples of some valid searches:

• this OR that
• this BUT NOT that
• this that other
• (this AND that) BUT NOT other
• "phrase one" OR ("phrase two" AND "phrase three")
• ("this phrase" OR "that phrase") AND ("third phrase" OR "fourth phrase")