Perhaps you should try some spelling variations:
22quality control » _quality control, byquality control, forquality control
2 reliability » 5 reliability
9 reliability » 5 reliability, 4 reliability
3 reliability » 5 reliability
2c safety » 22 safety, 25 safety, 21 safety
23 safety » 3 safety, 13 safety, 22 safety
2 safety » 5 safety, 4 safety, 3 safety
a safety » a safe

Try widening your search to All Fields.

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) OR (quality control))%((2 reliability) OR (((9 reliability) OR (3 reliability))))%((2c safety) OR (((23 safety) OR (((2 safety) OR (a safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (quality control))%((2 reliability) or (((9 reliability) or (3 reliability))))%((2c safety) or (((23 safety) or (((2 safety) OR (a safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (quality control))%((2 reliability) or (((9 reliability) or (3 reliability))))%((2c safety) or (((23 safety) or (((2 safety) OR (a safety)))))) and risk%22*.