Perhaps you should try some spelling variations:
22quality control » byquality control, forquality control, quality controls
_quality control » byquality control, quality controls, qouality control
9 reliability » 3 reliability, 5 reliability, 4 reliability
2 reliability » 3 reliability, 5 reliability
2c safety » 22 safety, 23 safety, 25 safety
2 safety » _ safety, a safety, 5 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))%((2((9 reliability) OR (2 reliability))) OR (((9 reliability) OR (2 reliability))))%((2c safety) OR (2 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))%((2((9 reliability) OR (2 reliability))) or (((9 reliability) OR (2 reliability))))%((2c safety) or (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (quality control))) or (_quality control))%((2((9 reliability) OR (2 reliability))) or (((9 reliability) OR (2 reliability))))%((2c safety) or (2 safety)) and risk%22*.