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