South vietnam
North Vietnam is bordered to the west by Laos and China, while South Vietnam does not exist as a separate country currently. But historically, it was bordered to the west by Cambodia and Laos.
Himalayas
Cambodia
The US is bordered to the south by Mexico.
Vietnam is bordered by the South China Sea
Lao is a landlocked country in southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south, and Thailand to the west.
Laos is a country in South East Asia. It is bordered by Burma, China, Vietnam, Cambodia and Thailand.
Vietnam is a country in the southeast of Asia bordered by China, Laos and Cambodia.
Lesotho is a country in southern Africa that is completely bordered by another single country, which is South Africa.
Denmark is bordered by Germany in South.
The US is bordered to the south by Mexico.