Pre SEA Games Tournament

I don't mind admitting I'm getting dead confused by all these tournaments going on now or coming on the near horizon.

4 Nations Football Tournament (Vientiane, Laos)

Thailand v Malaysia 2-2
Laos v Vietnam 2-2

Malaysia v Vietnam 3-1
Laos v Thailand 3-0

Vietnam v Thailand 1-3
Laos v Malaysia 1-1

I think the Thais, Malaysians and Vietnamese sent their Under 19s to this pre SEA games bash in Laos while the hosts put out their Under 23s.