Can I apply for a Multiple-Entry Tourist Visa in Thailand while on an exemption visa?

No problem to go and back in thailand,have entry visa 60 days witch can extend 30 days ..after you go other country..and go back Thailand no problem

How old are you? If you are 50 or older you could go down the non o based on retirement route.

Sounds complicated very interesting

You've got a few wires crossed 😕 But your question is totally understandable (y)

Tourist visas are bought at thai consulates in other countries BEFORE you wing your way to thailand, sadly you cannot get one after you're in the country.

Now as far as the 6 month METV (multi-entry tourist visa) you get that from a thai consulate in your country (or a country you hold long term residency in)

What that means is IF you legally live in Vietnam on a long term visa (what ever that might be) you could apply for the 6 month METV from either HCMC or Hanoi before you come here otherwise you would get that visa at the thai consulate in your country

The 6 month METV works like this.

- It is valid for 6 months from the date it's issued

- You can enter thailand an unlimited number of times during the validity

- Each entry is for 60 days

- Each entry can be extended once for 30 days inside the country at the immigration office where you live.

No matter whether you're in or out of thailand that visa runs down it's validity. The most you can possibly wring out of it is a 9 month stay, you do that by getting the visa as close to when you're traveling as you can, bouncing out/back to activate another 60 day entry on the visa and just before the visa itself expires you exit/re-enter one final time giving you a 60 day stamp )taking you to 8 months) and then get the 30 day extension on that (taking you to 9 months)