I've driven motorbikes through Dak Lak a few times. Really beautiful area. Just south of there is Da Lat and close by, there is one tiny coffeeshop run by some kids that live there that was my favorite... https://maps.app.goo.gl/PPy3c3T1oreRrDDR6
You brought up the people being displaced by settlements, but the film focuses on school teachers who get sent there against their will which completely changed the course of their lives. Back then almost everyone worked for the government and teachers, like soldiers, can be assigned to such outpost if they didn't have connections.