Perhaps you should try some spelling variations:
byquality control » quality control, _quality control, forquality control
5 reliability » 3 reliability
2 reliability » 3 reliability
10 safety » a safety, 4 safety, 3 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%((5 reliability) OR (2 reliability))%((10 safety) OR (((_ safety) OR (5 safety)))) AND risk%22".
• Adding a wildcard symbol may retrieve word variants: %byquality control%((5 reliability) OR (2 reliability))%((10 safety) OR (((_ safety) OR (5 safety)))) AND risk%22*.