Pay
Intruder,
You are quite correct, the salary in not competitive. But it gets worse, due to a shortage of crew, you can expect 85-100hrs per month, but the salary quoted provides for no over time. The master contract is supposed to be for 80hrs but when you work 100hrs, you get nothing additional. With orders of 350s & 787s starting to arrive in early 2015, you can expect more local crew transitioning to the wide bodies exacerbating the narrow bus crew shortage = more flying beyond 80hrs for free.
Oh and contrary to ideas that Vietnam is cheap (something's are!), prices are moving up and with the current salary having remained constant for approx 7yrs, factoring in inflation it's very basic. If you have kids, you can forget about. Schooling on avg will run you USD $15K per child per year. Also expect your landlord to hit you with an annual 10% increase in rent.