If you hold an Indonesia passport, you are Vietnam visa exempted for 30 days for each entry.
If you wish to stay longer, you have to get the visa for the trip.

There are 2 options for you:

– Apply visa on arrival (recommended – for travel by air only): get the visa letter within 2 working days (normal process) or within 1 working day (urgent process) then the visa stamp will be issued upon your arrival in Vietnam. APPLY NOW

– Apply visa at Vietnam embassy/consulates in nearest your place: The processing time is 4-5 working days and you will get the visa stamp before your departure.