Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 24 reliability, 20 reliability, 21 reliability
ic reliability » 5 reliability, 9 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
25 safety » 5 safety, 22 safety, _ safety
15 safety » 5 safety, 10 safety, 11 safety
23 safety » 3 safety, 13 safety, 22 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%((((2c reliability) OR (2 reliability))) OR (ic reliability))%((((25 safety) OR (15 safety))) OR (((23 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 (ic reliability))%((((25 safety) OR (15 safety))) or (((23 safety) or (2 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2c reliability) or (2 reliability))) or (ic reliability))%((((25 safety) OR (15 safety))) or (((23 safety) or (2 safety)))) and risk%22*.