Perhaps you should try some spelling variations:
22quality control » byquality control, forquality control, qualify control
qouality control » qualify control, quality contral, forquality control
_quality control » byquality control, qualify control, quality contol
quality controls » qualite controle, quality concepts
29 reliability » 2 reliability, 9 reliability, 24 reliability
2c safety » 22 safety, 23 safety, 25 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 (((qouality control) OR (((_quality control) OR (quality controls))))))%29 reliability%((2c 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 (((qouality control) or (((_quality control) or (quality controls))))))%29 reliability%((2c safety) OR (2 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((((22quality control) or (quality control))) or (((qouality control) or (((_quality control) or (quality controls))))))%29 reliability%((2c safety) OR (2 safety)) and risk%22*.