Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2c reliability » 20 reliability, 24 reliability, 29 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
9 reliability » 3 reliability, 5 reliability, 4 reliability
23 safety » 13 safety, 5 safety, 4 safety
2a safety » 25 safety, 21 safety, 24 safety
22 safety » 12 safety, 5 safety, 4 safety
2c safety » 25 safety, 21 safety, 24 safety
2 safety » 5 safety, 4 safety
3 safety » 5 safety, 4 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 (2 reliability))) OR (((ic reliability) OR (9 reliability))))%((((((2c safety) OR (((22 safety) OR (2 safety))))) OR (2a safety))) OR (((((23 safety) OR (3 safety))) OR (a safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((2c reliability) or (2 reliability))) or (((ic reliability) or (9 reliability))))%((((((2c safety) or (((22 safety) OR (2 safety))))) or (2a safety))) or (((((23 safety) or (3 safety))) or (a safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((2c reliability) or (2 reliability))) or (((ic reliability) or (9 reliability))))%((((((2c safety) or (((22 safety) OR (2 safety))))) or (2a safety))) or (((((23 safety) or (3 safety))) or (a safety)))) and risk%22*.