Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
ic reliability » 2 reliability, 5 reliability, 9 reliability
4 reliability » 3 reliability, 2 reliability, 5 reliability
2 safety » _ safety, a safety, 5 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))%((4 reliability) OR (ic reliability))%2 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) OR (_quality control))%((4 reliability) or (ic reliability))%2 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) OR (_quality control))%((4 reliability) or (ic reliability))%2 safety and risk%22*.