Perhaps you should try some spelling variations:
22quality control » byquality control, forquality control, quality controls
_quality control » byquality control, quality controls, qouality control
qualify control » quality controls, qouality control, quality contol
9 reliability » 3 reliability, 2 reliability, 5 reliability
2c safety » 2 safety, 22 safety, 25 safety
23 safety » 3 safety, 2 safety, 13 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 (qualify control))))%9 reliability%((2c safety) OR (23 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 (qualify control))))%9 reliability%((2c safety) or (23 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((((_quality control) OR (quality control))) or (qualify control))))%9 reliability%((2c safety) or (23 safety)) and risk%22*.