... Southeast Asia It is divided into three regions ( North Vietnam , Central Vietnam and South Vietnam ) with the area of 330, 9 91 km2 Vietnam enjoys tropical climate The Vietnamese unit of currency ... schools South Vietnam has an area of 330, 9 91 km2 ……… Vietnam has a tropical climate ……… Hanoi is the largest city in Vietnam ……… Vietnam had 80 .9 million people five years ago ……… There ... Southeast Asia It is divided into three regions ( North Vietnam , Central Vietnam and South Vietnam ) with the area of 330, 9 91 km2 Vietnam enjoys tropical climate The Vietnamese unit of currency...