Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, forquality control
byquality control » quality control, _quality control, forquality control
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
2c safety » 22 safety, 25 safety, 24 safety
21 safety » 11 safety, 1 safety, 22 safety
23 safety » 3 safety, 13 safety, 22 safety
2 safety » a 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) OR (byquality control))%((20 reliability) OR (ic reliability))%((((2c safety) OR (21 safety))) OR (((23 safety) OR (((2 safety) OR (_ safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (byquality control))%((20 reliability) or (ic reliability))%((((2c safety) OR (21 safety))) or (((23 safety) or (((2 safety) or (_ safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (byquality control))%((20 reliability) or (ic reliability))%((((2c safety) OR (21 safety))) or (((23 safety) or (((2 safety) or (_ safety)))))) and risk%22*.