Perhaps you should try some spelling variations:
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
20 reliability » 2 reliability, 10 reliability, 24 reliability
5 reliability » 3 reliability
a safety » a safe

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))%((20 reliability) OR (5 reliability))%a safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (byquality control))%((20 reliability) or (5 reliability))%a safety and risk%22*.