Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 3 reliability, 2 reliability, 7 reliability
5 reliability » 3 reliability
9 reliability » 3 reliability, 2 reliability, 4 reliability
2 safety » 3 safety

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 (5 reliability))) OR (((ic reliability) OR (9 reliability))))%((((2 safety) OR (4 safety))) OR (5 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22quality control%((((20 reliability) or (5 reliability))) or (((ic reliability) or (9 reliability))))%((((2 safety) OR (4 safety))) or (5 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %22quality control%((((20 reliability) or (5 reliability))) or (((ic reliability) or (9 reliability))))%((((2 safety) OR (4 safety))) or (5 safety)) and risk%22*.