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
29 reliability » 2 reliability, 9 reliability, 20 reliability
2c safety » 23 safety, 25 safety, 21 safety
22 safety » 12 safety, 5 safety, 4 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: %((((22quality control) OR (byquality control))) OR (((qouality control) OR (_quality control))))%29 reliability%((2c safety) OR (((22 safety) OR (2 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))))%29 reliability%((2c safety) or (((22 safety) OR (2 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (byquality control))) or (((qouality control) or (_quality control))))%29 reliability%((2c safety) or (((22 safety) OR (2 safety)))) and risk%22*.