VN and Thailand alone is too small to counter any threat from big countries like China-US, so there is No choice for VN except keep expanding our power and influence to equal with US-China power.
In 1979, we didnt want to occupy ur Bangkok even its easy , our forces always had order to stop and withdraw after entering some miles to Thailand . But some conflict with Thailand help us to understand that Thai army is very bad, poor trained, poor discipline and have no will to fight.
So, this time, we dont need to attack Thai again, just come and talk with their general and persuade them to support VN. Thai general dont wanna fight with VN again, so they will choose to support VN , thats why Major General Surasit Thanadtang just show it support to VN as we want
U can stop VN to get more support from Thai genneral only when ur guys can over thrown ur military dictatorship Govt.