Perhaps you should try some spelling variations:
quality controls » quality control, qualite controle, quality concepts
2 reliability » 3 reliability
5 reliability » 3 reliability
9 reliability » 3 reliability, 4 reliability

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: %quality controls%((((2 reliability) OR (5 reliability))) OR (9 reliability))%5 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality controls%((((2 reliability) OR (5 reliability))) or (9 reliability))%5 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality controls%((((2 reliability) OR (5 reliability))) or (9 reliability))%5 safety and risk%22*.