To download any app without worrying about whether it's supported in Vietnam, you need another supporting app to change your IP to a Western country, and that app is VPN One Click.
Tips for downloading unsupported apps on CH Play in Vietnam
Step 1: Download and install VPN One Click for your Android device.
Step 2: We can see that Microsoft Office Mobile is not yet supported in Vietnam.
Step 3: Launch VPN One Click and your original IP address remains in Vietnam. Choose a different country, here I choose the United States.
Step 5: Tap on I trust this app >OK.
Step 6: Wait for a moment until the IP has been changed to the United Kingdom.
Step 7: Go to Settings >Apps >CH Play >Clear Cache
Step 8: Now you can download Microsoft Office Mobile as usual.
https://Mytour.vn/download-unsupported-apps-on-ch-play-1767n.aspx
So we've just shared with you a tip to download unsupported apps on CH Play in Vietnam. Additionally, make sure to download some of the hottest Android games like Dino Egg Shooter and Need for Speed.
