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

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 (quality control))%((20 reliability) OR (ic reliability))%((((2 safety) OR (5 safety))) OR (23 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) OR (quality control))%((20 reliability) or (ic reliability))%((((2 safety) or (5 safety))) or (23 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) OR (quality control))%((20 reliability) or (ic reliability))%((((2 safety) or (5 safety))) or (23 safety)) and risk%22*.