The concept of Yau isn't too difficult, as there are no algorithms, except your normal 3x3 stage parity algorithms.
If you can't find one, I can either try to make one or possibly find one (I looked for around five minutes). You can probably find the concept explained in words under the tabs on this wiki page:
http://www.speedsolving.com/wiki/index.php/Yau_method
If I have time, I can make one. Bob Burton's page doesn't have a Yau tutorial, at least none that I know of, and that's where I usually go.