Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 2 reliability, 24 reliability, 20 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
2c safety » 22 safety, 25 safety, 21 safety
23 safety » 3 safety, 13 safety, 22 safety
2 safety » _ safety, a safety, 5 safety

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 (ic reliability))%((((2c safety) OR (2 safety))) OR (23 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((2c reliability) or (ic reliability))%((((2c safety) OR (2 safety))) or (23 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((2c reliability) or (ic reliability))%((((2c safety) OR (2 safety))) or (23 safety)) and risk%22*.