The short answer is no. No clock changing for Vietnam (where I am currently staying), or the rest of Asia -- with the exceptions like Mongolia and the Middle East.
The long answer: while most locations in North American and European countries observe daylight saving time, DST is (and has been) practically nonexistent in Asia, throughout Africa, and in some parts of South America.
It also seems that the majority of daylight savings time observers are in the northern hemisphere (north of the equator).
Here is a helpful map highlighting the countries that observe DST. I hope it helps!
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