Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 20 reliability, 29 reliability, ic reliability
24 reliability » 2.4 reliability, 4 reliability, 14 reliability
9 reliability » 4 reliability
23 safety » 3 safety, 22 safety, 5 safety
13 safety » 3 safety, 10 safety, 11 safety
2 safety » 5 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 (24 reliability))) OR (2 reliability))) OR (((((9 reliability) OR (3 reliability))) OR (5 reliability))))%((((23 safety) OR (13 safety))) OR (((2 safety) OR (_ safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((((((2c reliability) OR (24 reliability))) or (2 reliability))) or (((((9 reliability) or (3 reliability))) or (5 reliability))))%((((23 safety) or (13 safety))) or (((2 safety) or (_ safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((((2c reliability) OR (24 reliability))) or (2 reliability))) or (((((9 reliability) or (3 reliability))) or (5 reliability))))%((((23 safety) or (13 safety))) or (((2 safety) or (_ safety)))) and risk%22*.