All nationalities need to apply for a travel visa to enter Cambodia, except for citizens from Southeast Asian countries. The visa fee for a tourist is about US$ 20.
Today, although tips in Vietnam are not much, they are appreciated. Tipping is especially common in Hanoi, Ho Chi Minh City, and certain other major cities.
Most visitors to Vietnam need a visa to enter the country. A tourist visa for Vietnam can be obtained from any Vietnam Embassy or consulate office world wide.