Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
ic reliability » 5 reliability, 9 reliability, 8 reliability
11 reliability » 1 reliability, 3 reliability, 5 reliability
4 reliability » 3 reliability, 5 reliability
2 reliability » 3 reliability, 5 reliability
4 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: %_quality control%((ic reliability) OR (((11 reliability) OR (((4 reliability) OR (2 reliability))))))%4 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %_quality control%((ic reliability) or (((11 reliability) or (((4 reliability) or (2 reliability))))))%4 safety and risk%22*.