Going to Vietnam in August, I'm entitled for visa exemption but I'm going to exit the country by bus (HCMC - Phnom Penh).
I have tickets for a Phnom Penh - Siem Reap flight and REP-BKK, both are within the 15 days visa exemption limit.
Do you think they can work as proof of onward travel?
Do you think that is safer to get a visa in advance (no need of poot as far as i can understand)?