Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
25 reliability » 2.5 reliability, 251 reliability, 2 reliability
5 reliability » 3 reliability
3 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: %((22quality control) OR (_quality control))%((25 reliability) OR (5 reliability))%3 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((25 reliability) or (5 reliability))%3 safety and risk%22*.