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