Welcome to the forum tuanthaolove05.
Here we are discussing the dangers and etiquette of riding on the street in Canada, and someone from a place like HCM city joins in. Makes me thinks that maybe we haven't got it so bad here.
One advantage I think you have in HCM city is that bikes are an expected part of traffic. Here bikes have been seen a recreational toy for many for a long time. Some people look right past a bike because they don't expect to see one. Others feel bikes are a nuisance because they are slower than a car, and therefore should not share roads with motorized traffic, despite the fact bikes have the same right to use of public roads as any other vehicle (limited access freeways excepted of course).
In any case - welcome again. I look forward to hearing more of your perspective.