Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
qouality control » quality control, quality controls, _quality control
29 reliability » 20 reliability, 24 reliability, 2.6 reliability
2 reliability » 3 reliability, 5 reliability
9 reliability » 3 reliability, 5 reliability, 4 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 safety, 5 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))%((2 reliability) OR (((29 reliability) OR (9 reliability))))%((2c safety) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (qouality control))%((2 reliability) or (((29 reliability) OR (9 reliability))))%((2c safety) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (qouality control))%((2 reliability) or (((29 reliability) OR (9 reliability))))%((2c safety) or (22 safety)) and risk%22*.