Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
9 reliability » 3 reliability, 5 reliability, 2 reliability
4 safety » 5 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: %_quality control%((2c reliability) OR (((ic reliability) OR (9 reliability))))%((4 safety) OR (_ safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %_quality control%((2c reliability) or (((ic reliability) or (9 reliability))))%((4 safety) or (_ safety)) and risk%22*.