Perhaps you should try some spelling variations:
2.4 reliability » 2.2 reliability, 2.3 reliability, 2.5 reliability
2.6 reliability » 2 reliability, 16 reliability, 3.3 reliability
5.4 reliability » 5 reliability, 14 reliability, 3.3 reliability
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
3 reliability » 5 reliability
22 safety » 2 safety, 12 safety, 5 safety
2c safety » 2 safety, 23 safety, 25 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: %quality control%((((2c reliability) OR (((((2.4 reliability) OR (2.6 reliability))) OR (5.4 reliability))))) OR (((ic reliability) OR (3 reliability))))%((((2c safety) OR (22 safety))) OR (_ safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((((2c reliability) or (((((2.4 reliability) or (2.6 reliability))) or (5.4 reliability))))) or (((ic reliability) or (3 reliability))))%((((2c safety) OR (22 safety))) or (_ safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((((2c reliability) or (((((2.4 reliability) or (2.6 reliability))) or (5.4 reliability))))) or (((ic reliability) or (3 reliability))))%((((2c safety) OR (22 safety))) or (_ safety)) and risk%22*.