Turns out that the “offer” for VNA A320 FOs is a cheap and dirty trick done by FCI to attract interested aviators. When any applicant refers to this job, after apologizing because “VNA has put FO recruitment on hold” they quickly offer an interview for Jetstar, attaching their current T&Cs on the email.
It is confirmed that VNA is NOT hiring ex pat First Officers, so just beware of the agency you are dealing with...