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, 4 reliability, 14 reliability
ic reliability » 5 reliability, 8 reliability, 11 reliability
2 reliability » 3 reliability, 5 reliability
9 reliability » 3 reliability, 5 reliability, 4 reliability
23 safety » 2 safety, 13 safety, 22 safety
3 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))%((((2 reliability) OR (24 reliability))) OR (((ic reliability) OR (9 reliability))))%((23 safety) OR (3 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (_quality control))%((((2 reliability) or (24 reliability))) or (((ic reliability) or (9 reliability))))%((23 safety) OR (3 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((2 reliability) or (24 reliability))) or (((ic reliability) or (9 reliability))))%((23 safety) OR (3 safety)) and risk%22*.