Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
2c reliability » 2 reliability, 24 reliability, 20 reliability
ic reliability » 2 reliability, 9 reliability, 8 reliability
5 reliability » 2 reliability
a safety » a safe

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%((2c reliability) OR (((ic reliability) OR (((5 reliability) OR (3 reliability))))))%((a safety) OR (_ safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((2c reliability) or (((ic reliability) or (((5 reliability) or (3 reliability))))))%((a safety) OR (_ safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((2c reliability) or (((ic reliability) or (((5 reliability) or (3 reliability))))))%((a safety) OR (_ safety)) and risk%22*.