[whpalmer4]

I don't think "AND" works, nor would you want it for this search -- you're constructing a test to see if a given business matches what you are trying to find. If the result of the expression is true, then the business is a match. I don't think you are going to find many establishments that are both a Lowe's AND a Home Depot :)

"OR" is the only keyword I've seen documented, though Google's documentation seems a bit haphazard. In any case, OmniFocus hands off the search to Google and displays what comes back as the closest hit. If you've got a Lowe's 2 miles from your location and a Home Depot 1 mile from your location, a search for Lowe's OR "Home Depot" will return the Home Depot because it is the closest of the candidates. Get in your car and drive to a spot closer to the Lowe's than the Home Depot and the answer will change accordingly.

You can test out your searches in the Maps application. If you don't get the results you expect, likely reasons are that your search query doesn't mean what you think it does ("AND", no " around multiple-word items, etc.) or sometimes Google has the wrong information. Also, the "closest" location appears to be determined by straight-line distance, not the route that you would actually have to travel.