Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, quality contol
qouality control » quality controls, quality contral, forquality control
qualify control » quality controls, quality contol, quality contral
29 reliability » 2 reliability, 9 reliability, 20 reliability
2c safety » 2 safety, 22 safety, 23 safety
12 safety » 2 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: %((quality control) OR (((((_quality control) OR (qualify control))) OR (qouality control))))%29 reliability%((2c safety) OR (12 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((quality control) or (((((_quality control) or (qualify control))) or (qouality control))))%29 reliability%((2c safety) or (12 safety)) and risk%22*.