Citizens of Comoros are required to obtain a visa to enter Vietnam.

There is no embassy of Vietnam in Comoros & It is quite hassle to travel to the location of the embassy of Vietnam in Countries Close to Comoros such as Tanzania & Mozambique.

Is there any way to get visa for Vietnam without going to embassy?

There any many travel company in Vietnam providing service of consulting & supporting to get a visa at arrival airport when you land in Vietnam, you are advised to contact them online to ask for an arrangement to pick up visa on arrival at international airport of Vietnam.