Dear Juan David
Thanks for your concern,
Please follow the link to apply visa online with us https://www.vietnam-evisa.org/apply-visa.html
Apply visa online, you will geta visa stamp on the passport upon arrival, all you need to do is fill your information in the form and makeapayment 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 on arrival.
For any further details, please contact us at firstname.lastname@example.org call us at (+84) 909 343 525or +84.327.117.119