Perhaps you should try some spelling variations:
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
2.4 reliability » 2.6 reliability, 5.4 reliability, 2.2 reliability
5 reliability » 3 reliability
2c safety » 2 safety, 22 safety, 23 safety
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: %((_quality control) OR (byquality control))%((2.4 reliability) OR (5 reliability))%((2c safety) OR (3 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (byquality control))%((2.4 reliability) or (5 reliability))%((2c safety) or (3 safety)) and risk%22*.