Full service girls in Cambodia and Laos

Hanoi, Vietnam
Can anyone here give any tips for finding full service girls in Cambodia and Laos?

Are there any websites like Kynu in these countries? Or simple walk-up brothels like in Hong Kong?

I want to pay the rates that locals pay and I'm not that into massages that end in a handjob. I'm really just looking for sex or a simple BBBJ with CIM.
The first and only time I went to a massage parlour in Siem Reap about 10 years ago my massage girl looked like she was early teens so it put me off the whole experience. Ended up picking up backpackers and bar girls on pub street. Laos was the same, stayed away from massage parlours cos they had young girls at the front.