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 » 24 reliability, ic reliability, 21 reliability
20 reliability » 10 reliability, 24 reliability, 29 reliability
5 reliability » 3 reliability
2 reliability » 3 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, _ safety, a safety
12 safety » 2 safety, 10 safety, 11 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 (20 reliability))) OR (((5 reliability) OR (2 reliability))))%((2c safety) OR (((22 safety) OR (12 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 (20 reliability))) or (((5 reliability) or (2 reliability))))%((2c safety) or (((22 safety) or (12 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (byquality control))%((((2c reliability) OR (20 reliability))) or (((5 reliability) or (2 reliability))))%((2c safety) or (((22 safety) or (12 safety)))) and risk%22*.