Here you can find the file required for Haier Y11C 360 degree rotation laptops. These files will help you to fix the keyboard errors.
The errors can be sticky keys, repeatedly pressed keys and one or two keys not working.
Please understand that this cannot fix physical damage as the keyboards are very sensitive to dust, humidity, water or liquid spill.
But you can try if its only the software issue.
Good Luck
Download the files from the below link: