Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
2c reliability » 24 reliability, 20 reliability, 21 reliability
23 reliability » 2.3 reliability, 13 reliability, 24 reliability
ic reliability » 9 reliability, 8 reliability, 11 reliability
10 safety » _ safety, a safety, 5 safety
2c safety » 2 safety, 22 safety, 23 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 (((23 reliability) OR (3 reliability))))) OR (((ic reliability) OR (((5 reliability) OR (2 reliability))))))%((2c 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 (((23 reliability) or (3 reliability))))) or (((ic reliability) or (((5 reliability) OR (2 reliability))))))%((2c safety) or (10 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((2c reliability) or (((23 reliability) or (3 reliability))))) or (((ic reliability) or (((5 reliability) OR (2 reliability))))))%((2c safety) or (10 safety)) and risk%22*.