Perhaps you should try some spelling variations:
22quality control » _quality control, byquality control, forquality control
29 reliability » 2 reliability, 24 reliability, 2.6 reliability
9 reliability » 3 reliability, 2 reliability, 5 reliability
12 safety » 2 safety, 10 safety, 11 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))%((29 reliability) OR (9 reliability))%12 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (quality control))%((29 reliability) OR (9 reliability))%12 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (quality control))%((29 reliability) OR (9 reliability))%12 safety and risk%22*.