As I understand it 2 of the 777's are owned, 2 are leased, and 2 more are coming next year for a total of 6.
Right now they have 5 767's but the plan is to be down to 3 by next year. (plans have a habit of changing with short notice)
Vietnamese pilots get preference on all types and positions, but they generally can't fill positions internally and rely heavily on Expats for all 4 types. (ATR72, A320/321, B767, B777)
There is a big need for A320/321 Captains and F/O's right now as they are expanding the Airbus fleet dramatically.
Up until now, all expat pilots must be current on type within the last 6 months in order to be considered. (1,500 hrs on type I think)
They are now saying they will even consider upgrades for current Expats from one type to another or from F/O to Captain.
The plan is to fly direct to California some day, so there is speculation that they will need 744's or A340's because they don't have ETOPS certification.
Vietnam is most definitely a different place to live, and the airline may not be a "normal" airline, but everyone I know likes it here. One reason is that you are able to commute almost anywhere with a 6 week on 2 week off schedule. Rumour is that it may go down to a 3 week on, 9 day off sched some time soon.
Generally the few that leave are going after more money or long term security.
I can think of many other less desirable places to live and work.
Mike Sowsun