Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
20 reliability » 10 reliability, 24 reliability, 29 reliability
2 reliability » 3 reliability, 5 reliability
2c safety » 2 safety, 22 safety, 21 safety
25 safety » 5 safety, 2 safety, 15 safety
23 safety » 2 safety, 13 safety, 22 safety
3 safety » 5 safety, 4 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: %22quality control%((20 reliability) OR (2 reliability))%((((2c safety) OR (25 safety))) OR (((23 safety) OR (3 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((20 reliability) or (2 reliability))%((((2c safety) OR (25 safety))) or (((23 safety) or (3 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((20 reliability) or (2 reliability))%((((2c safety) OR (25 safety))) or (((23 safety) or (3 safety)))) and risk%22*.