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, 5 reliability, 8 reliability
9 reliability » 3 reliability, 2 reliability, 5 reliability
23 safety » 13 safety, 22 safety, a safety
2 safety » a safety, 5 safety, 4 safety
3 safety » a safety, 5 safety, 4 safety

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 (9 reliability))))%((((2 safety) OR (((23 safety) OR (_ safety))))) OR (3 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 (9 reliability))))%((((2 safety) or (((23 safety) or (_ safety))))) or (3 safety)) and risk%22*".