Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
2.4 reliability » 2.6 reliability, 5.4 reliability, 2.2 reliability
2c reliability » 2 reliability, 20 reliability, 29 reliability
24 reliability » 2 reliability, 14 reliability, 20 reliability
21 reliability » 2 reliability, 1 reliability, 11 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 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%((((((2c reliability) OR (((24 reliability) OR (2.4 reliability))))) OR (21 reliability))) OR (ic reliability))%((2c safety) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((((2c reliability) or (((24 reliability) OR (2.4 reliability))))) or (21 reliability))) or (ic reliability))%((2c safety) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((((2c reliability) or (((24 reliability) OR (2.4 reliability))))) or (21 reliability))) or (ic reliability))%((2c safety) or (22 safety)) and risk%22*.