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