This week-end (september 3rd and 4th) will take place the All Asian DX Contest. You could expect stations from all over Asia and Oceania to enjoy the contest. Vietnam will not be outside the competition and at least XV4Y will be active during the evenings (1300z-1600z).
These last weeks many stations have been active from Viet-Nam. You could expect a strong participation to this week-end SSB contest.
XV4Y is known to be QRV for CQ WPX Contest but only with reduced time. The strongest effort should be expected from XV1X as usual. Also look for 3W3B, XV2LC, XV2W…
Good luck in the contest!