Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
9 reliability » 3 reliability, 5 reliability, 2 reliability
2c safety » 25 safety, 21 safety, 24 safety
22 safety » 12 safety, 5 safety, 4 safety
23 safety » 3 safety, 13 safety, 5 safety
2 safety » 5 safety, 4 safety, 3 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%((20 reliability) OR (((ic reliability) OR (9 reliability))))%((((2c safety) OR (((22 safety) OR (2 safety))))) OR (23 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((20 reliability) or (((ic reliability) or (9 reliability))))%((((2c safety) or (((22 safety) OR (2 safety))))) or (23 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((20 reliability) or (((ic reliability) or (9 reliability))))%((((2c safety) or (((22 safety) OR (2 safety))))) or (23 safety)) and risk%22*.