For those who concern about how to obtain Vietnam visa on arrival.
Step 1: visit a travel agent's website and fill out application form.
Step 2: pay service fee
Step 3: wait 2 working days since the day you submit the form and get you visa approval letter
Step 4: go aboard and pay stamping fee to Vietnam Immigration officer at arrival airport and pick up your visa.
Have a good trip!
For more detailed information, please visit Vietnamvisa-easy.com