Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 20 reliability, 24 reliability, 29 reliability
8 reliability » 4 reliability, 7 reliability
2a safety » 2 safety, 22 safety, 23 safety
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%((2c reliability) OR (((((((8 reliability) OR (2 reliability))) OR (3 reliability))) OR (5 reliability))))%((a safety) OR (2a safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((2c reliability) or (((((((8 reliability) OR (2 reliability))) or (3 reliability))) or (5 reliability))))%((a safety) or (2a safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((2c reliability) or (((((((8 reliability) OR (2 reliability))) or (3 reliability))) or (5 reliability))))%((a safety) or (2a safety)) and risk%22*.