Unless you are experienced at driving a car or motorbike in Asia you are taking your life into your own hands.
The average Vietnamese road user has not had any tuition & scant regard for other road users & although most road users only drive at 20 / 25 mph though towns & city’s.
Vietnam is the single worst place in the world to self-drive a vehicle, personally after witnessing traffic here for years.
Its difficult to explain just how chaotic & unbelievable it is in Vietnam and until you have seen traffic here with your own eyes you are unlikely to understand what you are letting yourself in for.
An example of piss poor driving is this video below. Bus drivers and Truck drivers are the worst