Perhaps you should try some spelling variations:
22quality control » quality control, byquality control, forquality control
_quality control » quality control, byquality control, quality controls
2c reliability » 2 reliability, 24 reliability, 21 reliability
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
2c safety » 2 safety, 23 safety, 25 safety
22 safety » 2 safety, 12 safety, _ 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))%((((2c reliability) OR (20 reliability))) OR (ic reliability))%((2c safety) OR (22 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) or (_quality control))%((((2c reliability) or (20 reliability))) or (ic reliability))%((2c safety) OR (22 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (_quality control))%((((2c reliability) or (20 reliability))) or (ic reliability))%((2c safety) OR (22 safety)) and risk%22*.