Perhaps you should try some spelling variations:
22quality control » _quality control, byquality control, forquality control
2 reliability » 3 reliability, 5 reliability
9 reliability » 3 reliability, 5 reliability, 4 reliability
2c safety » 22 safety, 25 safety, 21 safety
23 safety » 3 safety, 22 safety, _ safety
13 safety » 3 safety, 10 safety, 11 safety
2 safety » _ safety, a safety, 5 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))%((2 reliability) OR (9 reliability))%((2c safety) OR (((((23 safety) OR (13 safety))) OR (2 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (quality control))%((2 reliability) or (9 reliability))%((2c safety) or (((((23 safety) OR (13 safety))) or (2 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (quality control))%((2 reliability) or (9 reliability))%((2c safety) or (((((23 safety) OR (13 safety))) or (2 safety)))) and risk%22*.