Perhaps you should try some spelling variations:
22quality control » quality control, _quality control, forquality control
byquality control » quality control, _quality control, forquality control
20 reliability » 2 reliability, 10 reliability, 24 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
safety » samety
safe » same

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 (byquality control))%((20 reliability) OR (ic reliability))%((a safety) OR (a safe)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22quality control) OR (byquality control))%((20 reliability) or (ic reliability))%((a safety) or (a safe)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((22quality control) OR (byquality control))%((20 reliability) or (ic reliability))%((a safety) or (a safe)) and risk%22*.