Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2.4 reliability » 2.6 reliability, 5.4 reliability, 2.2 reliability
29 reliability » 2 reliability, 9 reliability, 20 reliability
24 reliability » 2 reliability, 14 reliability, 20 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
2 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: %_quality control%((((29 reliability) OR (((24 reliability) OR (2.4 reliability))))) OR (ic reliability))%((2 safety) OR (5 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((((29 reliability) or (((24 reliability) OR (2.4 reliability))))) or (ic reliability))%((2 safety) or (5 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((29 reliability) or (((24 reliability) OR (2.4 reliability))))) or (ic reliability))%((2 safety) or (5 safety)) and risk%22*.