Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
qouality control » quality control, quality controls, _quality control
3 reliability » 5 reliability
2 safety » 5 safety, 4 safety, 3 safety
safety » samety
safe » same

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: %((22quality control) OR (qouality control))%3 reliability%((2 safety) OR (((a safety) OR (a safe)))) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (qouality control))%3 reliability%((2 safety) or (((a safety) or (a safe)))) and risk%22*.