Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
ic reliability » 2 reliability, 9 reliability, 8 reliability
5 reliability » 3 reliability, 2 reliability
2c safety » 2 safety, 22 safety, 23 safety
2a safety » 2 safety, 22 safety, 23 safety
a safety » _ safety, a safe

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