Perhaps you should try some spelling variations:
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
24 reliability » 2.4 reliability, 2 reliability, 4 reliability
3 safety » _ safety, a safety, 4 safety
5 safety » _ safety, a 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))%24 reliability%((3 safety) OR (5 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((byquality control) or (_quality control))%24 reliability%((3 safety) or (5 safety)) and risk%22*.