Search users and see which courses they're enrolled in

Hi,

I'm using Moodle 2.5. I can't find a way to see a list of users who are enrolled in specific courses. I can see it by category under the browse list of users but it's too huge of a list. Ideally I'd be able to search for someone who appears in course A & B. Anyone able to help me?

THANK YOU!

Bonnie