Perhaps you should try some spelling variations:
22quality control » quality control, forquality control, qouality control
byquality control » quality control, forquality control, qouality control
_quality control » quality control, qouality control, qualify control
quality controls » quality control, qualite controle, quality concepts
29 reliability » 2 reliability, 20 reliability, 24 reliability
9 reliability » 3 reliability, 5 reliability, 2 reliability
23 safety » 3 safety, 2 safety, 22 safety
13 safety » 3 safety, 10 safety, 11 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 (((((_quality control) OR (byquality control))) OR (quality controls))))%((29 reliability) OR (9 reliability))%((23 safety) OR (13 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (((((_quality control) or (byquality control))) or (quality controls))))%((29 reliability) or (9 reliability))%((23 safety) OR (13 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((((_quality control) or (byquality control))) or (quality controls))))%((29 reliability) or (9 reliability))%((23 safety) OR (13 safety)) and risk%22*.