Perhaps you should try some spelling variations:
qouality control » quality controls, _quality control, qualify control
29 reliability » 2 reliability, 9 reliability, 20 reliability
2c safety » 22 safety, 23 safety, 25 safety
2 safety » 5 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: %((quality control) OR (qouality control))%29 reliability%((2c safety) OR (2 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((quality control) or (qouality control))%29 reliability%((2c safety) OR (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((quality control) or (qouality control))%29 reliability%((2c safety) OR (2 safety)) and risk%22*.