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