Perhaps you should try some spelling variations:
22quality control » quality control, forquality control, quality controls
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
ic reliability » 7 reliability, 8 reliability, 11 reliability
5 reliability » 3 reliability
2 reliability » 3 reliability
23 safety » 3 safety, 13 safety, 5 safety
25 safety » 5 safety, 15 safety, 4 safety
22 safety » 12 safety, 5 safety, 4 safety
2 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))) OR (byquality control))%((ic reliability) OR (((5 reliability) OR (2 reliability))))%((((23 safety) OR (((25 safety) OR (2 safety))))) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22quality control) or (_quality control))) or (byquality control))%((ic reliability) or (((5 reliability) or (2 reliability))))%((((23 safety) or (((25 safety) OR (2 safety))))) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (_quality control))) or (byquality control))%((ic reliability) or (((5 reliability) or (2 reliability))))%((((23 safety) or (((25 safety) OR (2 safety))))) or (22 safety)) and risk%22*.