Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
ic reliability » 2 reliability, 7 reliability, 8 reliability
5 reliability » 3 reliability
22 safety » 12 safety, 5 safety, 4 safety
2a safety » 23 safety, 25 safety, 21 safety
2 safety » 5 safety, 4 safety, 3 safety
a safety » a safe

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%((ic reliability) OR (5 reliability))%((((((22 safety) OR (2 safety))) OR (a safety))) OR (2a safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((ic reliability) or (5 reliability))%((((((22 safety) OR (2 safety))) or (a safety))) or (2a safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((ic reliability) or (5 reliability))%((((((22 safety) OR (2 safety))) or (a safety))) or (2a safety)) and risk%22*.