I went through and tagged G3, Male, Female, and Side 45, so that I could find all of the Male G3 charactes standing to the side. 
I have tried comma, and, &, and just putting them all in the search box, but I get the result [Male & G3 was not found].
The manual doesn't give an example of using multiple tags to search. 
So, how do I do it?

Also, some G3 characters have a G3 on the thumbnail, some don't.  Some of them have image tags for other things, some don't.  The G3 on the thumbnail shows up in different places.
Is there a way for me to add my own image tags to the images of the thumbnails?  I can only resave into Custom, not Template. 
Thanks!