This process is not probably what you think. This is a huge business worldwide, There is a lot of red tape and paperwork involved, it is the main reason, I try not to deal with American clients , it is possible just takes more time. The man comes to Vietnam multiple times, gets to know her, her family and go over everything. This is not a sight unseen deal. At times it doesn't work out but that i with any relationship, if it doesn't work out, what has happened, is the girl either returns to Vietnam or stays if she likes the environment and can support herself. I had a client who got divorced 3 years after the got married. She loved living in Singapore and got a herself a good job and loves life there, two others I personally know got divorced 4 and 6 years after and both returned to Vietnam. 80% of them work out though.