Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 20 reliability, 24 reliability, 29 reliability
8 reliability » 4 reliability, 7 reliability
2c safety » 2 safety, 22 safety, 25 safety
23 safety » 3 safety, 2 safety, 13 safety
15 safety » 5 safety, 10 safety, 11 safety
a safety » a safe

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 (3 reliability))))) OR (((8 reliability) OR (5 reliability))))%((((2c safety) OR (23 safety))) OR (((15 safety) OR (a 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 (3 reliability))))) or (((8 reliability) or (5 reliability))))%((((2c safety) or (23 safety))) or (((15 safety) or (a safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2c reliability) or (((2 reliability) OR (3 reliability))))) or (((8 reliability) or (5 reliability))))%((((2c safety) or (23 safety))) or (((15 safety) or (a safety)))) and risk%22*.