How do I do an "or" orperation for a search in Apple Mail? Can I do a search in Apple Mail that does an "or" on supplied criteria?

For example, someone has two email addresses. I want to search for all emails from that person, so I'd like to say "one email address or the other" in my search query.
You can use Boolean operators:

Use Boolean searches:
Use Boolean operators such as AND, OR, and NOT. For example, to search for messages that contain “yosemite” and “yellowstone” but not “teton,” type “yosemite AND yellowstone NOT teton” or “yosemite AND yellowstone -teton.” You must type Boolean operators in uppercase.

Souce: http://support.apple.com/kb/PH14902