The easiest place to find boys in vn is without a shadow of a doubt vietfun.com just click on the picture under the text "Vietfun Video." from there you want to find a profile from a gay. Click on the the word GAY. That gives you only gay profiles. You narrow your search down to any age you like. Just click on the number you're interested in.

They also have a chat box which is also booming. However, most people don't speak English in those chat rooms.

if you need some help, info or someone to party with, just send me a private msg. I live in HCMC and I definitely know my way around the (small) gay scene.