Perhaps you should try some spelling variations:
22quality control » quality control, forquality control, quality controls
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
2c reliability » 2 reliability, 24 reliability, ic reliability
5 reliability » 3 reliability, 2 reliability
2c safety » 2 safety, 22 safety, 23 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 (((byquality control) OR (_quality control))))%((2c reliability) OR (5 reliability))%((2c safety) OR (_ safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((byquality control) or (_quality control))))%((2c reliability) or (5 reliability))%((2c safety) or (_ safety)) and risk%22*.