Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 2 reliability, 7 reliability, 8 reliability
5 reliability » 3 reliability
23 safety » 3 safety, 2 safety, 13 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))) OR (5 reliability))%((23 safety) OR (_ safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((2c reliability) OR (ic reliability))) or (5 reliability))%((23 safety) or (_ safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2c reliability) OR (ic reliability))) or (5 reliability))%((23 safety) or (_ safety)) and risk%22*.