Perhaps you should try some spelling variations:
22quality control » quality control, forquality control, quality controls
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qualify control
qouality control » quality control, quality controls, qualify control
29 reliability » 2 reliability, 9 reliability, 20 reliability
24 reliability » 2.4 reliability, 2 reliability, 4 reliability
2c safety » 2 safety, 22 safety, 23 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 (((((_quality control) OR (byquality control))) OR (qouality control))))%((29 reliability) OR (24 reliability))%2c safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (((((_quality control) or (byquality control))) or (qouality control))))%((29 reliability) OR (24 reliability))%2c safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((((_quality control) or (byquality control))) or (qouality control))))%((29 reliability) OR (24 reliability))%2c safety and risk%22*.