Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
ic reliability » 5 reliability, 9 reliability, 8 reliability
2 reliability » 5 reliability
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: %((_quality control) OR (quality control))%((((2 reliability) OR (3 reliability))) OR (ic reliability))%23 safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_quality control) or (quality control))%((((2 reliability) OR (3 reliability))) or (ic reliability))%23 safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (quality control))%((((2 reliability) OR (3 reliability))) or (ic reliability))%23 safety and risk%22*.