Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 2 reliability, 24 reliability, 29 reliability
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 3 reliability, 5 reliability, 2 reliability
2 safety » 3 safety
safety » samety
safe » same

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 (20 reliability))) OR (ic reliability))%((((2 safety) OR (((5 safety) OR (a safe))))) OR (4 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((2c reliability) OR (20 reliability))) or (ic reliability))%((((2 safety) or (((5 safety) or (a safe))))) or (4 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2c reliability) OR (20 reliability))) or (ic reliability))%((((2 safety) or (((5 safety) or (a safe))))) or (4 safety)) and risk%22*.