Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, byquality control
qouality control » quality control, _quality control, qualify control
quality controls » quality control, qualite controle, quality concepts
29 reliability » 2 reliability, 9 reliability, 20 reliability
25 safety » 5 safety, 15 safety, 22 safety
2 safety » 5 safety, 4 safety, 3 safety

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 (((qouality control) OR (quality controls))))%29 reliability%((25 safety) OR (2 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((qouality control) or (quality controls))))%29 reliability%((25 safety) or (2 safety)) and risk%22*.