The answer is NO. Only a group of Chinese Vietnamese people living in Chợ Lớn, Hochiminh city speak Cantonese at home. However the number of those people is getting smaller and smaller. Most of them had origin from Guangdong province, China since and their ancestor immigrated to Vietnam since 17th century. Looking back to the history, there were also many Chinese people immigrated to Vietnam since Tang Dynasty and after many centuries with the rise and fall of the history of Vietnam, some in them also changed their surnames to Nguyen - the most popular surname in Vietnam (There are so many branches of surname Nguyen in Vietnam. However they are not relatives of each other). The rest in them still keep their surname until now such as: Đường (Tang), Đàm (谭/譚), Lương (Leung), Trần (Chen), Khổng (Kong)… and they consider them as pure Vietnamese people after many generations have been born and grown up in Vietnam.