That's good. I moved to Vietnam in 2012 with a three month visa and I extended that visa 2 times. Then, in August of 2013, went to Cambodia to make a new Vietnam visa. I extended that visa every three months for about 5 times in a row until March 2015. So, I did not leave Vietnam every three months like some foreigners do. Many people say to me that you have to come into the country and then leave after three months to make a new visa. Most tourists and aliens would say that. I would tell them that I did not. I would instead extend my visa without leaving the country.