Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
2c reliability » 20 reliability, 24 reliability, 29 reliability
21 reliability » 1 reliability, 11 reliability, 20 reliability
ic reliability » 5 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability, 5 reliability
9 reliability » 3 reliability, 5 reliability, 4 reliability
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) OR (quality control))%((((2c reliability) OR (((21 reliability) OR (2 reliability))))) OR (((ic reliability) OR (9 reliability))))%((((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) or (quality control))%((((2c reliability) or (((21 reliability) or (2 reliability))))) or (((ic reliability) or (9 reliability))))%((((23 safety) OR (22 safety))) or (3 safety)) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (quality control))%((((2c reliability) or (((21 reliability) or (2 reliability))))) or (((ic reliability) or (9 reliability))))%((((23 safety) OR (22 safety))) or (3 safety)) and risk%22*.