Hello, I applied for a single entry visa to Vietnam about a month ago, and I received a letter from you confirming that I could apply for it upon arrival. Now I changed my plans and I want to enter Vietnam twice during my journey. I was wandering if it's possible to change my application to a multiple entry or perhaps apply for another single entry visa. Please note that the first entry is only for transit purposes as I'd be heading toward Cambodia. I'd appreciate your quick reply. Kind regards, Jakub Kulg