Perhaps you should try some spelling variations:
22quality control » _quality control, byquality control, forquality control
2c reliability » 20 reliability, 24 reliability, 21 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
25 safety » 15 safety, 22 safety, 4 safety
23 safety » 3 safety, 13 safety, 22 safety
2 safety » 4 safety, 3 safety

Try widening your search to All Fields.

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))%((((2c reliability) OR (2 reliability))) OR (ic reliability))%((25 safety) OR (((((23 safety) OR (2((2 safety) OR (5 safety))))) OR (((2 safety) OR (5 safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (quality control))%((((2c reliability) or (2 reliability))) or (ic reliability))%((25 safety) or (((((23 safety) or (2((2 safety) OR (5 safety))))) or (((2 safety) OR (5 safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (quality control))%((((2c reliability) or (2 reliability))) or (ic reliability))%((25 safety) or (((((23 safety) or (2((2 safety) OR (5 safety))))) or (((2 safety) OR (5 safety)))))) and risk%22*.