Perhaps you should try some spelling variations:
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 2 reliability, 7 reliability, 8 reliability
5 reliability » 3 reliability
22 safety » 12 safety, 5 safety, 4 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%((2c reliability) OR (((ic reliability) OR (5 reliability))))%((2 safety) OR (22 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %quality control%((2c reliability) or (((ic reliability) or (5 reliability))))%((2 safety) or (22 safety)) and risk%22*.