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 » 20 reliability, 29 reliability, 21 reliability
24 reliability » 2.4 reliability, 4 reliability, 14 reliability
ic reliability » 7 reliability, 8 reliability, 11 reliability
5 reliability » 3 reliability
2 reliability » 3 reliability
2c safety » 2 safety, 22 safety, 23 safety
10 safety » 5 safety, 4 safety, 3 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 (((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 (24 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 (24 reliability))) or (((ic reliability) or (((5 reliability) OR (2 reliability))))))%((2c safety) or (10 safety)) and risk%22*.