Perhaps you should try some spelling variations:
byquality control » _quality control, forquality control, qouality control
quality controls » qualite controle, quality concepts
5 reliability » 3 reliability
2 safety » 5 safety, 4 safety, 3 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: %((((byquality control) OR (quality control))) OR (quality controls))%5 reliability%((2 safety) OR (_ safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((((byquality control) or (quality control))) or (quality controls))%5 reliability%((2 safety) or (_ safety)) and risk%22*.