Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 2 reliability, 20 reliability, 24 reliability
8 reliability » 3 reliability, 2 reliability, 4 reliability
5 reliability » 3 reliability
24 safety » 2.4 safety, 2 safety, 14 safety
4 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 (((8 reliability) OR (5 reliability))))%((4 safety) OR (((24 safety) OR (_ safety)))) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %22quality control%((2c reliability) or (((8 reliability) or (5 reliability))))%((4 safety) or (((24 safety) or (_ safety)))) and risk%22*.