Perhaps you should try some spelling variations:
ic reliability » 5 reliability, 2 reliability, 7 reliability
2c reliability » 2 reliability, 20 reliability, 24 reliability
12 safety » 1 safety, 5 safety, 4 safety
10 safety » 5 safety, 4 safety, 3 safety
2c safety » 22 safety, 23 safety, 21 safety
25 safety » 5 safety, 15 safety, 22 safety
11 safety » 5 safety, 4 safety, 3 safety
a safety » a safe
2 safety » 5 safety, 4 safety, 3 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))%((((((2c safety) OR (25 safety))) OR (2 safety))) OR (((((12 safety) OR (((11 safety) OR (a safety))))) OR (10 safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((2c reliability) or (ic reliability))%((((((2c safety) OR (25 safety))) or (2 safety))) or (((((12 safety) or (((11 safety) or (a safety))))) or (10 safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((2c reliability) or (ic reliability))%((((((2c safety) OR (25 safety))) or (2 safety))) or (((((12 safety) or (((11 safety) or (a safety))))) or (10 safety)))) and risk%22*.