I know I said I was finished talking about the buses, but I lied. Because there's one more thing I forgot to mention: the religious shrines found on the dashboards of many of them.
There is no official religion in Vietnam. However, Buddhism is the dominate faith with about 85% or so supposedly practicing. Of the other 15%, Christianity makes up the largest portion with around 10% (although I truly believe the statistics are very wrong on this). Strangely, on many public buses you'll find a shrine to either the Buddha or Jesus on the dashboard. With Buddha, it might only be a figurine or an entire display including incense sticks. With Jesus, it might be his cross hanging on the frame of the window or a figurine of the Virgin Mary and baby Jesus. Not as heavy as in Latin American countries, but the same idea nonetheless.
That's all I have to report.