Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
quality contral » quality controls, equality central, quality contract
9 reliability » 3 reliability, 5 reliability, 2 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 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: %((((quality control) OR (_quality control))) OR (quality contral))%9 reliability%((2c safety) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((quality control) or (_quality control))) or (quality contral))%9 reliability%((2c safety) OR (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((quality control) or (_quality control))) or (quality contral))%9 reliability%((2c safety) OR (22 safety)) and risk%22*.