i want to know. can i get visa from air port?

DEAR Mohammed islam, 

FOR Canadian passport holder You can apply visa online with us 

please follow the link to apply 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.

For any further details, please contact us at visa@vietnam-evisa.org or call us at (+84) 909 343 525

Best Regards.
Stepfanno Tran (Mr. )