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