I’m Indian citizen. Is it possible to take a visa at the airport from Ho Chi Minh City?

Yes, sir. The kind of visa you are mentioning is called Vietnam visa on arrival. To get it, you need to apply online to get visa approval letter before your departure to Vietnam. With this letter, you will take the flight to Vietnam and then get the official visa stamp once you arrive at Vietnam airport.

Here is the link to apply: Online form for Vietnam visa for Indian citizens.