Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 20 reliability, 24 reliability, ic reliability
2 reliability » 3 reliability
5 reliability » 3 reliability
25 safety » 5 safety, 23 safety, 4 safety
22 safety » 12 safety, 5 safety, 4 safety
15 safety » 5 safety, 10 safety, 11 safety
3 safety » 5 safety, 4 safety
2 safety » 5 safety, 4 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%((((2c reliability) OR (2 reliability))) OR (5 reliability))%((((((25 safety) OR (22 safety))) OR (15 safety))) OR (((3 safety) OR (2 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((2c reliability) or (2 reliability))) or (5 reliability))%((((((25 safety) OR (22 safety))) or (15 safety))) or (((3 safety) or (2 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2c reliability) or (2 reliability))) or (5 reliability))%((((((25 safety) OR (22 safety))) or (15 safety))) or (((3 safety) or (2 safety)))) and risk%22*.