Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
quality contract » quality contracts, quality contrast, quality construct
quality contral » quality controls, equality central, quality contrast
29 reliability » 9 reliability, 20 reliability, 24 reliability
2 reliability » 3 reliability, 5 reliability
2c safety » 2 safety, 22 safety, 23 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) OR (quality contract))))))%((29 reliability) OR (2 reliability))%2c 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) or (quality contract))))))%((29 reliability) OR (2 reliability))%2c safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((quality control) or (((_quality control) or (((quality contral) or (quality contract))))))%((29 reliability) OR (2 reliability))%2c safety and risk%22*.