Perhaps you should try some spelling variations:
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
3 reliability » 5 reliability
2 safety » 5 safety, 4 safety, 3 safety

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: %quality control%((((2c reliability) OR (ic reliability))) OR (3 reliability))%((2 safety) OR (_ safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((((2c reliability) or (ic reliability))) or (3 reliability))%((2 safety) OR (_ safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((((2c reliability) or (ic reliability))) or (3 reliability))%((2 safety) OR (_ safety)) and risk%22*.