Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, qouality control
quality controls » quality control
quality concepts » stability concepts
qualite controle » quality control
29 reliability » 2 reliability, 9 reliability, 20 reliability
2c safety » 2 safety, 22 safety, 23 safety
a safety » a safe

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) OR (((((quality controls) OR (quality concepts))) OR (qualite controle))))))%29 reliability%((2c 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) or (((((quality controls) OR (quality concepts))) or (qualite controle))))))%29 reliability%((2c safety) or (a safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((_quality control) or (((((quality controls) OR (quality concepts))) or (qualite controle))))))%29 reliability%((2c safety) or (a safety)) and risk%22*.