Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 20 reliability, 24 reliability, 29 reliability
21 reliability » 1 reliability, 11 reliability, 20 reliability
2 reliability » 3 reliability, 5 reliability
4 reliability » 3 reliability, 5 reliability
9 reliability » 3 reliability, 5 reliability
23 safety » 3 safety, 13 safety, 22 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 (((21 reliability) OR (2 reliability))))) OR (((4 reliability) OR (9 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 (((21 reliability) or (2 reliability))))) or (((4 reliability) or (9 reliability))))%((23 safety) OR (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((2c reliability) or (((21 reliability) or (2 reliability))))) or (((4 reliability) or (9 reliability))))%((23 safety) OR (2 safety)) and risk%22*.