Perhaps you should try some spelling variations:
byquality control » quality control, _quality control, forquality control
2c reliability » 20 reliability, 24 reliability, ic reliability
2 reliability » 3 reliability
5 reliability » 3 reliability
2 safety » 5 safety, 4 safety
3 safety » 5 safety, 4 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: %byquality control%((((2c reliability) OR (2 reliability))) OR (5 reliability))%((2((2 safety) OR (_ safety))) OR (((3 safety) OR (((((2 safety) OR (_ safety))) OR (a safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%byquality control%((((2c reliability) or (2 reliability))) or (5 reliability))%((2((2 safety) OR (_ safety))) or (((3 safety) or (((((2 safety) OR (_ safety))) or (a safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %byquality control%((((2c reliability) or (2 reliability))) or (5 reliability))%((2((2 safety) OR (_ safety))) or (((3 safety) or (((((2 safety) OR (_ safety))) or (a safety)))))) and risk%22*.