Perhaps you should try some spelling variations:
ic reliability » 3 reliability, 2 reliability, 7 reliability
5 reliability » 3 reliability
2c safety » 2 safety, 25 safety, 21 safety
23 safety » 2 safety, 13 safety, 5 safety
22 safety » 2 safety, 12 safety, 5 safety
3 safety » 5 safety, 4 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%((5 reliability) OR (ic reliability))%((((2c safety) OR (((23 safety) OR (22 safety))))) OR (3 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %quality control%((5 reliability) or (ic reliability))%((((2c safety) or (((23 safety) or (22 safety))))) or (3 safety)) and risk%22*.