Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 2 reliability, 20 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
2c safety » 2 safety, 22 safety, 23 safety
3 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%((2c reliability) OR (ic reliability))%((2c safety) OR (((2((3 safety) OR (5 safety))) OR (((3 safety) OR (5 safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((2c reliability) or (ic reliability))%((2c safety) or (((2((3 safety) OR (5 safety))) or (((3 safety) OR (5 safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((2c reliability) or (ic reliability))%((2c safety) or (((2((3 safety) OR (5 safety))) or (((3 safety) OR (5 safety)))))) and risk%22*.