Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
20 reliability » 10 reliability, 24 reliability, 29 reliability
4 reliability » 5 reliability
2 reliability » 5 reliability
3 reliability » 5 reliability
a safety » a safe

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: %22quality control%((20 reliability) OR (((4 reliability) OR (((2 reliability) OR (3 reliability))))))%a safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((20 reliability) or (((4 reliability) or (((2 reliability) OR (3 reliability))))))%a safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((20 reliability) or (((4 reliability) or (((2 reliability) OR (3 reliability))))))%a safety and risk%22*.