Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
21 reliability » 1 reliability, 11 reliability, 20 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
2c safety » 22 safety, 23 safety, 25 safety
13 safety » 3 safety, 10 safety, 11 safety
2 safety » 5 safety, 4 safety, 3 safety
a 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%((((21 reliability) OR (2 reliability))) OR (ic reliability))%((((2c safety) OR (((2((2 safety) OR (_ safety))) OR (a safety))))) OR (((13 safety) OR (((2 safety) OR (_ safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((21 reliability) or (2 reliability))) or (ic reliability))%((((2c safety) or (((2((2 safety) OR (_ safety))) or (a safety))))) or (((13 safety) or (((2 safety) OR (_ safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((21 reliability) or (2 reliability))) or (ic reliability))%((((2c safety) or (((2((2 safety) OR (_ safety))) or (a safety))))) or (((13 safety) or (((2 safety) OR (_ safety)))))) and risk%22*.