Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2 reliability » 5 reliability
9 reliability » 5 reliability, 4 reliability
3 reliability » 5 reliability
22 safety » 12 safety, 5 safety, 4 safety
2 safety » 5 safety, 4 safety, 3 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%((2 reliability) OR (((9 reliability) OR (3 reliability))))%((2 safety) OR (((22 safety) OR (a safety)))) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %22quality control%((2 reliability) or (((9 reliability) or (3 reliability))))%((2 safety) or (((22 safety) or (a safety)))) and risk%22*.