Perhaps you should try some spelling variations:
byquality control » quality control, _quality control, forquality control
quality controls » quality control, qualite controle, quality concepts
2 reliability » 3 reliability, 5 reliability
2_ safety » 2 safety, 22 safety, 23 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 controls))%2 reliability%((2_ safety) OR (_ safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((byquality control) or (quality controls))%2 reliability%((2_ safety) or (_ safety)) and risk%22*.