Is that a problem if my passport is going to expired?

Visitors travelling to Vietnam are required to be in possession of passport that are valid for six months beyond the period of their intended stay in Vietnam. It is advised that you should renew your passport before applying for Vietnam visa on arrival.  If your passport expires during your stay in Vietnam, you must get it renewed or get a new one from embassy or consulate of your country in Vietnam. It would be best to get your passport renewed before your departure