To make things clear, Vietnam didn't legalize Bitcoin, and will likely never do so. Instead, they have shown their hostility towards crypto currencies by prohibiting their usage. The move from universities in Vietnam to accept Bitcoin payments from that point can be seen as them breaking the law, and thus get a hefty fine as result (I hope not of course, but it's a very likely scenario). From that point it's a very daring action, but at least it shows that they aren't letting the government dictate them entirely, and that's what I have a lot respect for. If more entities have the guts to do so, it will slowly but surely show the government that they can't just continue to mess with everyone....