Still peering at your atlas trying to find this place?
Look a bit closer, it's the little town with a frustrated immobilised cyclist jumping up and down in it.
I have found an approximate grid reference for the lat'n'long inclined among you:
104 degrees East, 22 degrees North.
Altitude about 1600 metres, in case you're trying to get a 3-D fix.
My broken freehub has been sent to Hanoi, and persons unknown are scurrying around trying to find a replacement.