Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
5 reliability » 2 reliability
12 safety » 2 safety, 10 safety, 11 safety
4 safety » _ safety, a safety
5 safety » _ safety, a 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%((5 reliability) OR (3 reliability))%((12 safety) OR (((4 safety) OR (5 safety)))) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %_quality control%((5 reliability) or (3 reliability))%((12 safety) or (((4 safety) or (5 safety)))) and risk%22*.