Perhaps you should try some spelling variations:
_quality control » byquality control, quality controls, qouality control
21 reliability » 1 reliability, 11 reliability, 20 reliability
ic reliability » 3 reliability, 7 reliability, 8 reliability
2 reliability » 3 reliability
5 reliability » 3 reliability
4 reliability » 3 reliability
2c safety » 2 safety, 22 safety, 23 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) OR (quality control))%((((((((2 reliability) OR (5 reliability))) OR (21 reliability))) OR (4 reliability))) OR (ic reliability))%2c safety AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_quality control) or (quality control))%((((((((2 reliability) OR (5 reliability))) or (21 reliability))) or (4 reliability))) or (ic reliability))%2c safety and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((_quality control) or (quality control))%((((((((2 reliability) OR (5 reliability))) or (21 reliability))) or (4 reliability))) or (ic reliability))%2c safety and risk%22*.