Be REALLY careful when requesting assistance in a post, or mentioning what can't be done in Vietnam.
One member of the forum (not a U.S. citizen) recently mentioned in a post that he is not able to get a 1 year visa.
Magically, a brand new forum user sent an unsolicited private message, saying that they can help.
It occurs to me that not only is this probably a scam, but a contact like this in response to your own post about a problem would be a great way for an identity thief to operate.
If you want to do online business with someone in Vietnam, make sure you get a recommendation or two from someone who's been active here for a while.