Can you “OR” on Craigslist?

I sure can’t. Maybe I’m missing something obvious, but Craigslist doesn’t seem to have a way to do OR in searches. You add words, they get AND’ed together, and the search gets more restrictive.

It’d be nice if they did. As it is, I had to set up 4 RSS feeds for different job search terms and the feeds contain duplicates. Holler at me if you’ve solved this.