I cannot find any information on redemptions on VN, curious if anyone has experience. I need to get a family of four from HKG to Nha Trang in the Spring and these tickets are pricing out such that 20k per ticket would be a good deal. Any experiences with finding space (I know I will have to call)?

I know it's a lot to ask for 4 tickets (I'd take 2) but believe it or not we've found 4 in business class with our *A miles for all but this portion of the trip.