Hands Down...Go with PARC!
Maybe we need to have a look at the other 60 some pages about Vietnam Airlines that exist within this zip-code (pprune). Parc and RAL don't seem to be providing too many new pilots to VNA these days. It would appear that only Direct Personnel folks are getting in. Sure, it's political, but that's just how is goes sometimes.
Whilst it is generally agreed that Parc is the best choice, if you really want to join VNA, you may need to consider DP as the most likely immediate option.