Perhaps you should try some spelling variations:
2.4 reliability » 2.6 reliability, 5.4 reliability, 2.2 reliability
21 reliability » 2 reliability, 1 reliability, 11 reliability
24 reliability » 2 reliability, 14 reliability, 29 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
2 safety » _ safety, a 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: %quality control%((((21 reliability) OR (((24 reliability) OR (2.4 reliability))))) OR (ic reliability))%2 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((((21 reliability) or (((24 reliability) OR (2.4 reliability))))) or (ic reliability))%2 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((((21 reliability) or (((24 reliability) OR (2.4 reliability))))) or (ic reliability))%2 safety and risk%22*.