This question is about luggage and transfer with separate flight tickets.
I'm in Vietnam now on a 30-day single-entry visa. I wish to go to Singapore before my visa expires. If I go, then I have to fly back to Vietnam to catch a flight to Europe. The airline that flies me to Vietnam from Singapore will not be the same as the airline that flies me to Europe. I have spoken to these two airlines, and they cannot transfer the luggage between flights.
My question is, do I really need to buy another 30-day visa just to check in my luggage in Vietnam?
Edit: I'm Swedish, but I can't apply for the 15-day visa within 30 days after the visa I have has expired.