Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 24 reliability, 20 reliability, 21 reliability
ic reliability » 8 reliability, 11 reliability, 13 reliability
2 reliability » 3 reliability
9 reliability » 3 reliability, 4 reliability
5 reliability » 3 reliability
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 (2 reliability))) OR (ic reliability))) OR (((9 reliability) OR (5 reliability))))%2 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((((((2c reliability) or (2 reliability))) or (ic reliability))) or (((9 reliability) OR (5 reliability))))%2 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((((2c reliability) or (2 reliability))) or (ic reliability))) or (((9 reliability) OR (5 reliability))))%2 safety and risk%22*.