Perhaps you should try some spelling variations:
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
21 reliability » 1 reliability, 11 reliability, 20 reliability
2 reliability » 3 reliability, 5 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: %((byquality control) OR (_quality control))%((21 reliability) OR (2 reliability))%2 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((byquality control) or (_quality control))%((21 reliability) or (2 reliability))%2 safety and risk%22*.