Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
quality concepts » stability concepts
29 reliability » 2 reliability, 9 reliability, 20 reliability
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: %((22quality control) OR (((_quality control) OR (quality concepts))))%29 reliability%3 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((_quality control) or (quality concepts))))%29 reliability%3 safety and risk%22*.