When you decide to apply for a visa, it is really important to know which type of visa is suitable for your entry purpose.
Vietnam Tourist visa: for a limited period of leisure travel, no business activities allowed. This type of visa is for those who want to enter Vietnam with the purpose of travelling or engaging in recreational activities such as having a rest, going sigh-seeing, visiting relatives or friends, taking part in short-term non-work purposes or even short-term studying. Tourist visa is usually valid for 1 month; you can enter Vietnam once or more than once with this kind of visa. I.E. it allows single or multiple entries. Tourist visas may be extended after your arrival in Vietnam.