Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
2c safety » 2 safety, 22 safety, 25 safety
23 safety » 2 safety, 22 safety, 5 safety
13 safety » 10 safety, 11 safety, 1 safety
3 safety » 5 safety, 4 safety

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%((20 reliability) OR (ic reliability))%((2c safety) OR (((((23 safety) OR (13 safety))) OR (3 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((20 reliability) or (ic reliability))%((2c safety) or (((((23 safety) OR (13 safety))) or (3 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((20 reliability) or (ic reliability))%((2c safety) or (((((23 safety) OR (13 safety))) or (3 safety)))) and risk%22*.