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