Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 2 reliability, 24 reliability, 22 reliability
20 reliability » 2 reliability, 10 reliability, 24 reliability
21 reliability » 2 reliability, 1 reliability, 11 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
23 safety » 3 safety, 13 safety, 22 safety
2 safety » _ safety, a safety, 5 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 (21 reliability))) OR (ic reliability))%((23 safety) OR (2 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 (21 reliability))) or (ic reliability))%((23 safety) or (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((((2c reliability) OR (20 reliability))) or (21 reliability))) or (ic reliability))%((23 safety) or (2 safety)) and risk%22*.