Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
21 reliability » 2 reliability, 1 reliability, 11 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 safety, _ 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%((21 reliability) OR (ic reliability))%((2c safety) OR (22 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %22quality control%((21 reliability) or (ic reliability))%((2c safety) or (22 safety)) and risk%22*.