Perhaps you should try some spelling variations:
22quality control » byquality control, forquality control, quality controls
_quality control » byquality control, quality controls, qualify control
qouality control » quality controls, qualify control, quality contral
29 reliability » 2 reliability, 9 reliability, 24 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 safety, a 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 (_quality control))) OR (qouality control))%29 reliability%((2c safety) OR (((22 safety) OR (_ safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((((22quality control) OR (quality control))) or (_quality control))) or (qouality control))%29 reliability%((2c safety) or (((22 safety) or (_ safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((((22quality control) OR (quality control))) or (_quality control))) or (qouality control))%29 reliability%((2c safety) or (((22 safety) or (_ safety)))) and risk%22*.