Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
24 reliability » 2.4 reliability, 4 reliability, 14 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
21 safety » 11 safety, 1 safety, 22 safety
24 safety » 2.4 safety, 4 safety, 14 safety
23 safety » 3 safety, 13 safety, 22 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%((((24 reliability) OR (2 reliability))) OR (ic reliability))%((((((21 safety) OR (24 safety))) OR (2((2 safety) OR (a safety))))) OR (((23 safety) OR (((2 safety) OR (a safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((24 reliability) or (2 reliability))) or (ic reliability))%((((((21 safety) or (24 safety))) or (2((2 safety) OR (a safety))))) or (((23 safety) or (((2 safety) OR (a safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((24 reliability) or (2 reliability))) or (ic reliability))%((((((21 safety) or (24 safety))) or (2((2 safety) OR (a safety))))) or (((23 safety) or (((2 safety) OR (a safety)))))) and risk%22*.