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 » 3 reliability, 5 reliability, 2 reliability
2 safety » 5 safety, 4 safety
3 safety » 5 safety, 4 safety
a safety » a safe

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))%((2 safety) OR (((3 safety) OR (a 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))%((2 safety) or (((3 safety) OR (a safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((2c reliability) or (20 reliability))) or (ic reliability))%((2 safety) or (((3 safety) OR (a safety)))) and risk%22*.