Perhaps you should try some spelling variations:
2c reliability » 24 reliability, 20 reliability, 21 reliability
ic reliability » 5 reliability, 9 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
2c safety » 2 safety, 22 safety, 23 safety
12 safety » 2 safety, 10 safety, 11 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 (2 reliability))))%((2c safety) OR (12 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((2c reliability) or (((ic reliability) OR (2 reliability))))%((2c safety) or (12 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((2c reliability) or (((ic reliability) OR (2 reliability))))%((2c safety) or (12 safety)) and risk%22*.