Perhaps you should try some spelling variations:
22quality control » _quality control, forquality control, quality controls
byquality control » _quality control, forquality control, quality controls
2c reliability » 2 reliability, 20 reliability, 24 reliability
3 reliability » 5 reliability
2c safety » 23 safety, 25 safety, 21 safety
22 safety » 12 safety, 5 safety, 4 safety
2 safety » 5 safety, 4 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) OR (((byquality control) OR (quality control))))%((2c reliability) OR (3 reliability))%((((2c safety) OR (2 safety))) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (((byquality control) or (quality control))))%((2c reliability) or (3 reliability))%((((2c safety) OR (2 safety))) or (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((byquality control) or (quality control))))%((2c reliability) or (3 reliability))%((((2c safety) OR (2 safety))) or (22 safety)) and risk%22*.