Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2.4 reliability » 5.4 reliability, 2.2 reliability, 2.3 reliability
2.6 reliability » 16 reliability, 3.3 reliability, 5.4 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
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: %_quality control%((((2 reliability) OR (((2.4 reliability) OR (2.6 reliability))))) OR (ic reliability))%2 safety AND risk%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((((2 reliability) or (((2.4 reliability) OR (2.6 reliability))))) or (ic reliability))%2 safety and risk%22*".