Pretty easy to do Vietnam and Thailand in a month . Since you ' ll be in Hong Kong anyway , regional flights should be cheap , so just fly into Vietnam . Maybe fly to Hanoi , get buses or trains to the south 12 weeks , then cross to Cambodia and then into Thailand . Maybe that ' s rushing it a bit for month , so maybe fly from Saigon to Bangkok . An alternative would be to get a bus from Hanoi to Laos , go through there , end up in Thailand and make your way to Bangkok . You might need to get a visa in advance for Vietnam , the others will be easy . Flying out of Bangkok is a good idea you could go to other places in Thailand like Chiang Mai or the islands by plane or bus , then return for the flight out . <| sep |> We watch Adam Sandler movies while eating jar upon jar of miracle whip