Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 2 reliability, 24 reliability, 29 reliability
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
2c safety » 22 safety, 25 safety, 21 safety
23 safety » 3 safety, 13 safety, 22 safety
2 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 (20 reliability))) OR (ic reliability))%((2c safety) OR (((23 safety) OR (((2 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 (20 reliability))) or (ic reliability))%((2c safety) or (((23 safety) or (((2 safety) or (5 safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((2c reliability) OR (20 reliability))) or (ic reliability))%((2c safety) or (((23 safety) or (((2 safety) or (5 safety)))))) and risk%22*.