Hmmm... Here's my take, trying to understand how you "feel" in that dream.
So, if Vietnam is a mouse trap 🪤, then visa is the trap door. You are clearly having a sweet home "inside" the mouse trap, have comfort and food there. The problem now is, once you got out from that trap, you're having trouble to open the trapdoor and re-enter again.
Shit, I don't know what am I talking about anymore. I can feel it that way by reading your dream. It's not exactly lost' lost. More like there's no clear direction of what to do with that visa that keeps you in the matrix.
yeah, that's probably it. I am in the middle of a process that will clear that all up at the moment, so we'll see if the dreams cease once that is all taken care of