Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
qouality control » quality control, quality controls, _quality control
2c reliability » 2 reliability, 20 reliability, 24 reliability
29 reliability » 2 reliability, 9 reliability, 20 reliability
2 safety » 4 safety, 3 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 (qouality control))%((2c reliability) OR (29 reliability))%((((2 safety) OR (5 safety))) OR (2((2 safety) OR (5 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (qouality control))%((2c reliability) or (29 reliability))%((((2 safety) OR (5 safety))) or (2((2 safety) OR (5 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (qouality control))%((2c reliability) or (29 reliability))%((((2 safety) OR (5 safety))) or (2((2 safety) OR (5 safety)))) and risk%22*.