Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
20 reliability » 10 reliability, 24 reliability, 29 reliability
8 reliability » 5 reliability, 4 reliability, 7 reliability
2 reliability » 5 reliability
3 reliability » 5 reliability
4 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))%((20 reliability) OR (((8 reliability) OR (((2 reliability) OR (3 reliability))))))%4 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((quality control) or (_quality control))%((20 reliability) or (((8 reliability) or (((2 reliability) or (3 reliability))))))%4 safety and risk%22*.