Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
8 reliability » 4 reliability, 9 reliability
22 safety » 12 safety, _ safety, a 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: %22quality control%((((2 reliability) OR (5 reliability))) OR (((8 reliability) OR (3 reliability))))%((2 safety) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((2 reliability) OR (5 reliability))) or (((8 reliability) or (3 reliability))))%((2 safety) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2 reliability) OR (5 reliability))) or (((8 reliability) or (3 reliability))))%((2 safety) or (22 safety)) and risk%22*.