Hey there, and welcome to Apple Support Communities nguyenanhpl1970,
We can certainly understand your concern and are here to help.
We recommend checking out this link for more information on what to do if your iPhone screen is not working.
" If the screen isn't working on your iPhone or iPad
You might need to set up service for your device.
If your screen is too sensitive or responds intermittently to touch
- Restart your iPhone or iPad.
- Make sure that your screen is clean and free of any debris or water.
- Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different outlet, cable, or charger.
- Remove any cases or screen protectors.
Contact Apple Support
If your screen still isn't working, you might need to set up service for your device. Contact Apple Support. "
For additional information, check out this link: If the screen isn't working on your iPhone or iPad - Apple Support
These steps will help you troubleshoot your issue and direct you to additional support if they don't help resolve the matter.
Kindest regards!