Perhaps you should try some spelling variations:
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
ic reliability » 2 reliability, 7 reliability, 8 reliability
5 reliability » 3 reliability
23 safety » 3 safety, 13 safety, 22 safety
2 safety » 5 safety, 4 safety, 3 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) OR (byquality control))%((5 reliability) OR (ic reliability))%((23 safety) OR (2 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (byquality control))%((5 reliability) or (ic reliability))%((23 safety) or (2 safety)) and risk%22*.