Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
22 reliability » 2.2 reliability, 12 reliability, 24 reliability
ic reliability » 9 reliability, 8 reliability, 11 reliability
2c reliability » 24 reliability, 20 reliability, 21 reliability
2 reliability » 3 reliability
5 reliability » 3 reliability
2c safety » 23 safety, 25 safety, 21 safety
22 safety » 12 safety, _ safety, a safety
10 safety » _ safety, a safety, 5 safety
2 safety » _ safety, a safety, 5 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))%((((2c reliability) OR (((22 reliability) OR (2 reliability))))) OR (((ic reliability) OR (5 reliability))))%((((2c safety) OR (((22 safety) OR (2 safety))))) OR (10 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (_quality control))%((((2c reliability) or (((22 reliability) or (2 reliability))))) or (((ic reliability) or (5 reliability))))%((((2c safety) or (((22 safety) OR (2 safety))))) or (10 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((2c reliability) or (((22 reliability) or (2 reliability))))) or (((ic reliability) or (5 reliability))))%((((2c safety) or (((22 safety) OR (2 safety))))) or (10 safety)) and risk%22*.