Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
ic reliability » 7 reliability, 8 reliability, 11 reliability
2c safety » 2 safety, 22 safety, 25 safety
23 safety » 3 safety, 2 safety, 13 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%((((((2 reliability) OR (5 reliability))) OR (3 reliability))) OR (ic reliability))%((((2c safety) OR (23 safety))) OR (_ safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((((((2 reliability) OR (5 reliability))) or (3 reliability))) or (ic reliability))%((((2c safety) or (23 safety))) or (_ safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((((2 reliability) OR (5 reliability))) or (3 reliability))) or (ic reliability))%((((2c safety) or (23 safety))) or (_ safety)) and risk%22*.