Broken plastic "hooks" that keeps the Screen

Hello everyone! My girlfriend own this laptop, that yesterday started to not recognizing the keyboard and touchpad (they are placed in a detachable dock).

I was following the guide for opening and re-positioning the ribbon cable. While separating the screen from the plastic back-plate, i broke some of the things that keep the two parts together and makes those "crack" noise when you open.

I'am sorry for not knowing the right name, i hope i've described them well enough.

The problem is that i actually broke some of them, and now the screen is loose and not well closed. Do you have any suggestion about?