Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
21 reliability » 2 reliability, 1 reliability, 11 reliability
24 reliability » 2.4 reliability, 2 reliability, 14 reliability
ic reliability » 3 reliability, 5 reliability, 2 reliability
4 reliability » 3 reliability, 5 reliability, 2 reliability
2 safety » 5 safety, 4 safety, 3 safety

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22quality control) OR (_quality control))%((((21 reliability) OR (((24 reliability) OR (4 reliability))))) OR (ic reliability))%2 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((21 reliability) or (((24 reliability) or (4 reliability))))) or (ic reliability))%2 safety and risk%22*.