BuddyPress.org

When my users sign up on my page they can choose to be:
-Seller
-Buyer or
-Both Seller and buyer.
That I have set up as a dropdown select box under the profile fields.

But when I go to the profile search I can only search for each of the three profile types. I would like to ensure that if I search for “seller” all the members who see them self as “both seller and buyer” should also occur in the search results.
How do I do that?