Perhaps you should try some spelling variations:
22quality control » byquality control, forquality control, quality controls
_quality control » byquality control, quality controls, qualify control
qouality control » quality controls, qualify control, quality contral
29 reliability » 2 reliability, 24 reliability, 2.6 reliability
9 reliability » 3 reliability, 2 reliability, 5 reliability
25 safety » 5 safety, 15 safety, 22 safety
2 safety » _ safety, a 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 control))) OR (((_quality control) OR (qouality control))))%((29 reliability) OR (9 reliability))%((25 safety) OR (2 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22quality control) or (quality control))) or (((_quality control) OR (qouality control))))%((29 reliability) or (9 reliability))%((25 safety) or (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (quality control))) or (((_quality control) OR (qouality control))))%((29 reliability) or (9 reliability))%((25 safety) or (2 safety)) and risk%22*.