Perhaps you should try some spelling variations:
24 reliability » 2.4 reliability, 2 reliability, 4 reliability
11 reliability » 3 reliability, 5 reliability, 2 reliability
ic reliability » 3 reliability, 5 reliability, 2 reliability
1 reliability » 3 reliability, 5 reliability, 2 reliability
23 safety » 3 safety, 13 safety, 22 safety
2 safety » 5 safety, 4 safety, 3 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%((((24 reliability) OR (((11 reliability) OR (1 reliability))))) OR (ic reliability))%((23 safety) OR (2 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((((24 reliability) or (((11 reliability) OR (1 reliability))))) or (ic reliability))%((23 safety) or (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((((24 reliability) or (((11 reliability) OR (1 reliability))))) or (ic reliability))%((23 safety) or (2 safety)) and risk%22*.