Ho Chi Minh City is 14 hours ahead of Vancouver
There is no standard 8-to-6 overlap. Someone joins early or late.
Vancouver and Ho Chi Minh City are too far apart in time (14 hours) for their workdays to line up during regular hours. For anything urgent, agree on an early-morning or late-night bridge hour in advance so nobody's caught off guard. Just remember Vancouver changes its clocks for daylight saving and Ho Chi Minh City doesn't, so confirm the overlap whenever the seasons turn.