Perhaps you should try some spelling variations:
byquality control » quality control, _quality control, forquality control
ic reliability » 9 reliability, 8 reliability, 11 reliability
2c safety » 2 safety, 22 safety, 23 safety
3 safety » _ safety, a safety, 5 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: %byquality control%((4 reliability) OR (((((ic reliability) OR (((5 reliability) OR (3 reliability))))) OR (2 reliability))))%((2c safety) OR (3 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%byquality control%((4 reliability) or (((((ic reliability) or (((5 reliability) OR (3 reliability))))) or (2 reliability))))%((2c safety) or (3 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %byquality control%((4 reliability) or (((((ic reliability) or (((5 reliability) OR (3 reliability))))) or (2 reliability))))%((2c safety) or (3 safety)) and risk%22*.