We are from Spain and would like a multi-entry visa. We know the date that we will fly from Bangkok to HCMC, but we do not know the date of exit of the country yet. How do we apply for the visa? Thank you.

I (german) and my boyfriend (swedish) are travelling to vietnam from seoul. We only have a one-way-flight to saigon and plan on leaving vietnam by boat to cambodia. I already got a 14-days single-entry visa for vietnam, my boyfriend does not need one, but is thinking about getting one, too. We are worried that the airline will simply deny us access in seoul, because we have no outbound flight from vietnam. My question is, do we actually need an outbound flight from vietnam (i.e. to cambodia) in order to be let into the country or will our visas be enough? Furthermore, does my boyfriend actually need a visa if he does not have an outbound-flight from vietnam? thank you, josephine