Using the Key Word search type, and setting the OR comparison to a coma with a space:
", "
should work, just make sure to select the includes comparison type.
send a copy of the page if continue to have troubles.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.