Do I need a visa

Dear Ximena sepulveda,

In this case, you should use Colombian passport to apply visa because visa letter will be processed based on passport information, not Resident visa.

If you arrive just 20 days, you can apply 01 month visa type. https://www.vietnam-evisa.org/visa-fee.html.

You just fill in application form in the link: http://www.vietnam-evisa.org/apply-visa.html. After receiving your payment, we will process and send to you the approval letter via your email, then just need print the letter out and use it to get visa stamp directly at Vietnam airport.

Regards,

Hari Nguyen (Ms.)