The paper is the first to examine international students in Vietnam despite the country's long-existing effort at internationalization. The empirical study is conducted at a large public university in the capital of Vietnam, a popular destination for foreign students. The study explores socio-cultural adaptation of foreign students and finds that lack of support system severely affects their adaptation, especially in academic adaptation. The paper aims to draw attention to the renovation of university system in order to better serve the needs of a diverse student body.