Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 2 reliability, 24 reliability, ic reliability
2c safety » 2 safety, 22 safety, 25 safety
23 safety » 3 safety, 2 safety, 13 safety
a safety » _ 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%((((2c safety) OR (23 safety))) OR (a safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%2c reliability%((((2c safety) OR (23 safety))) or (a safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%2c reliability%((((2c safety) OR (23 safety))) or (a safety)) and risk%22*.