When I greet locals in Vietnam, I always consider the context. At work, I greet my boss with "Chào sếp" (Hello, boss) and my colleagues with "Chào anh/chị". At home, I say "Dạ, con chào bố mẹ" (Hello, mom and dad). When meeting a group of people, I usually say "Chào mọi người" (Hello, everyone). We also greet each other based on the time of day—"Chào buổi sáng" (Good morning), "Chào buổi trưa" (Good afternoon), and "Chào buổi tối" (Good evening). It's important to greet elders first in Vietnamese culture, and a warm smile always helps!