Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
qouality control » quality control, quality controls, qualify control
4 reliability » 5 reliability, 2 reliability
3 reliability » 5 reliability

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 (qouality control))%((4 reliability) OR (3 reliability))%5 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (qouality control))%((4 reliability) or (3 reliability))%5 safety and risk%22*.