dook,
The strip is still in use, but only by cars and motorcycles.
None of the new guesses is correct. Here is the view the other way:
Note: the words on the building translate as Town Hall.
This strip was a satellite to a much busier one just down the road. Mostly used by FAC O-1s, but also by Caribous!
In latitude terms, it is north of Tay Ninh but south of Da Lat.