Dear Md Rajib.
Thanks for your concern,
For Vietnam visa, Bangladesh passport holder need confirmed air ticket before i apply for e-visa.
You can pay for Visa service fee only without any extra service.
Firstly, please send the following information to our email firstname.lastname@example.org for visa process:
• Passport scan
• Onward flight ticket
• Hotel booking or staying address
• The front side of your credit card which paid for your visa
Note: The visa validity date would be based on the onward flight ticket (maximum of 25 days)
After that, please fill in the form and make payment at https://www.vietnam-evisa.org/apply-visa.html
The service fee is 150 USD/person (NOT including stamping fee 25USD/person at the airport) to process 1 month single tourist visa.
Please note it’s take 10 working days to process your visa
For any further details, please contact us at email@example.com or call us at +84.327.117.119
Stepfano Tran (Mr.)