Perhaps you should try some spelling variations:
_quality control » quality control, byquality control, quality controls
ic reliability » 2 reliability, 7 reliability, 8 reliability
5 reliability » 3 reliability
9 reliability » 3 reliability, 2 reliability, 4 reliability
21 safety » 2 safety, 11 safety, 1 safety
23 safety » 2 safety, 13 safety, 5 safety
22 safety » 2 safety, 12 safety, 5 safety
3 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%((5 reliability) OR (((ic reliability) OR (9 reliability))))%((((21 safety) OR (((23 safety) OR (22 safety))))) OR (3 safety)) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%_quality control%((5 reliability) or (((ic reliability) OR (9 reliability))))%((((21 safety) or (((23 safety) or (22 safety))))) or (3 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %_quality control%((5 reliability) or (((ic reliability) OR (9 reliability))))%((((21 safety) or (((23 safety) or (22 safety))))) or (3 safety)) and risk%22*.