visa ?

Dear rathana ung

Thanks for your concern

If you wish to enter vietnam multiple time during a period. Please follow the link to apply multiple entry tourist visa on arrival online https://www.vietnam-evisa.org/apply-visa.html

Apply visa online, You will get visa stamp on the passport upon arrival, All you need to do is fill your information in the form and make payment online.
After that, we will send You the approval letter via email, please print it out to board the plane and use it to get visa stamp on the passport upon arrival.

Best Regards
Stepfanno Tran (Mr .)