Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
11 reliability » 1 reliability, 3 reliability, 5 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
22 safety » 2 safety, 5 safety, 4 safety
12 safety » 2 safety, 10 safety, 11 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: %((_quality control) OR (quality control))%((11 reliability) OR (ic reliability))%((22 safety) OR (12 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_quality control) or (quality control))%((11 reliability) or (ic reliability))%((22 safety) OR (12 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (quality control))%((11 reliability) or (ic reliability))%((22 safety) OR (12 safety)) and risk%22*.