Perhaps you should try some spelling variations:
byquality control » quality control, _quality control, forquality control
2 reliability » 5 reliability
3 safety » a safety, 4 safety
5 safety » a safety

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "%byquality control%((2 reliability) OR (3 reliability))%((_ safety) OR (((3 safety) OR (5 safety)))) AND risk%22".
• Adding a wildcard symbol may retrieve word variants: %byquality control%((2 reliability) OR (3 reliability))%((_ safety) OR (((3 safety) OR (5 safety)))) AND risk%22*.