Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
24 reliability » 2.4 reliability, 2 reliability, 14 reliability
ic reliability » 2 reliability, 9 reliability, 8 reliability
2c reliability » 2 reliability, 20 reliability, 21 reliability
4 reliability » 2 reliability
5 reliability » 2 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 safety, _ safety
10 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 (((24 reliability) OR (4 reliability))))) OR (((ic reliability) OR (((5 reliability) OR (3 reliability))))))%((((2c safety) OR (22 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 (((24 reliability) or (4 reliability))))) or (((ic reliability) or (((5 reliability) OR (3 reliability))))))%((((2c safety) or (22 safety))) or (10 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((2c reliability) or (((24 reliability) or (4 reliability))))) or (((ic reliability) or (((5 reliability) OR (3 reliability))))))%((((2c safety) or (22 safety))) or (10 safety)) and risk%22*.