Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
qouality control » quality control, quality controls, qualify control
9 reliability » 3 reliability, 5 reliability, 2 reliability
2c safety » 2 safety, 22 safety, 25 safety
23 safety » 3 safety, 2 safety, 22 safety
13 safety » 3 safety, 10 safety, 11 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 (_quality control))) OR (qouality control))%9 reliability%((2c safety) OR (((23 safety) OR (13 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22quality control) or (_quality control))) or (qouality control))%9 reliability%((2c safety) or (((23 safety) OR (13 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (_quality control))) or (qouality control))%9 reliability%((2c safety) or (((23 safety) OR (13 safety)))) and risk%22*.