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