Perhaps you should try some spelling variations:
22quality control » _quality control, byquality control, forquality control
qouality control » quality controls, _quality control, qualify control
20 reliability » 2 reliability, 10 reliability, 24 reliability
9 reliability » 2 reliability, 5 reliability, 4 reliability
23 safety » 3 safety, 2 safety, 13 safety

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) OR (quality control))))%((20 reliability) OR (((9 reliability) OR (3 reliability))))%23 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (((qouality control) or (quality control))))%((20 reliability) or (((9 reliability) OR (3 reliability))))%23 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((qouality control) or (quality control))))%((20 reliability) or (((9 reliability) OR (3 reliability))))%23 safety and risk%22*.