Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2.4 reliability » 2.6 reliability, 5.4 reliability, 2.2 reliability
24 reliability » 2 reliability, 14 reliability, 29 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
3 safety » a safety, 5 safety, 4 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%((((24 reliability) OR (2.4 reliability))) OR (ic reliability))%((_ safety) OR (3 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((((24 reliability) OR (2.4 reliability))) or (ic reliability))%((_ safety) or (3 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((((24 reliability) OR (2.4 reliability))) or (ic reliability))%((_ safety) or (3 safety)) and risk%22*.