Plenty of Philippine nationals working in service industry jobs like Pacific Coffee, etc. Not my bailiwick, but clearly there must exist an imported labour program separate to the domestic helper program.
OP should use some initiative and get out and about and find Filipinos currently working legally in service industry jobs in HK and ask them how (and importantly WHERE) they were recruited. Chances are through extortionate agents back home. But the first step is finding out from people who have already achieved the desired result.