Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, forquality control
byquality control » quality control, _quality control, forquality control
2c reliability » 20 reliability, 24 reliability, 29 reliability
5 reliability » 3 reliability
2 reliability » 3 reliability
2c safety » 25 safety, 21 safety, 24 safety
23 safety » 3 safety, 5 safety, 4 safety
13 safety » 3 safety, 10 safety, 11 safety
22 safety » 12 safety, 5 safety, 4 safety
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 (byquality control))%((2c reliability) OR (((5 reliability) OR (2 reliability))))%((((2c safety) OR (((((23 safety) OR (2 safety))) OR (13 safety))))) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (byquality control))%((2c reliability) or (((5 reliability) or (2 reliability))))%((((2c safety) or (((((23 safety) OR (2 safety))) or (13 safety))))) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (byquality control))%((2c reliability) or (((5 reliability) or (2 reliability))))%((((2c safety) or (((((23 safety) OR (2 safety))) or (13 safety))))) or (22 safety)) and risk%22*.