Now that I'm looking at itm you really can't search for anything specific. You can set certain options that search "Males" with the skills of "Music". You can change those around, but that doesn't really help.
The only thing you can do, is if you know someone who made a Mii AND has posted it there, you can search by their number, which you have to ask them for :lol:
Look, here is my RuPaul
7263-2829-5552
To look this up, go to the Posting Plaza. Click on the "Popular" at the bottom. Underneath "Favorites" you'll see a magnifying glass. That's Search. At the top of THAT, there's a arrow circle thing, click that and it'll change to entry number. Type in that number and that's pretty much how you can search for specific Miis.
Annoying, I know :lol: