Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
quality controls » quality control, qualite controle, quality concepts
2c reliability » 20 reliability, 24 reliability, 29 reliability
4 safety » 5 safety

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 controls))%((2c reliability) OR (((((5 reliability) OR (3 reliability))) OR (2 reliability))))%4 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (quality controls))%((2c reliability) or (((((5 reliability) OR (3 reliability))) or (2 reliability))))%4 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (quality controls))%((2c reliability) or (((((5 reliability) OR (3 reliability))) or (2 reliability))))%4 safety and risk%22*.