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 » 2 reliability, 20 reliability, ic reliability
24 reliability » 2.4 reliability, 2 reliability, 4 reliability
25 safety » 15 safety, 22 safety, 23 safety
3 safety » 4 safety
2 safety » 4 safety

Try widening your search to All Fields.

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 (3 reliability))) OR (5 reliability))%((25 safety) OR (((((3 safety) OR (5 safety))) OR (2 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 (3 reliability))) or (5 reliability))%((25 safety) or (((((3 safety) or (5 safety))) or (2 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((((2c reliability) OR (24 reliability))) or (3 reliability))) or (5 reliability))%((25 safety) or (((((3 safety) or (5 safety))) or (2 safety)))) and risk%22*.