Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
20 reliability » 10 reliability, 24 reliability, 29 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
2c safety » 2 safety, 22 safety, 23 safety
2a safety » 2 safety, 22 safety, 23 safety
13 safety » 3 safety, 10 safety, 11 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) OR (_quality control))%((((20 reliability) OR (2 reliability))) OR (ic reliability))%((((2c safety) OR (2a safety))) OR (((13 safety) OR (a 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 (2 reliability))) or (ic reliability))%((((2c safety) or (2a safety))) or (((13 safety) or (a safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) OR (_quality control))%((((20 reliability) or (2 reliability))) or (ic reliability))%((((2c safety) or (2a safety))) or (((13 safety) or (a safety)))) and risk%22*.