Perhaps you should try some spelling variations:
byquality control » quality control, forquality control, quality controls
_quality control » quality control, quality controls, qouality control
2c reliability » 2 reliability, 20 reliability, 24 reliability
5 reliability » 3 reliability

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: %((byquality control) OR (_quality control))%((2c reliability) OR (5 reliability))%((4 safety) OR (((5 safety) OR (_ safety)))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((byquality control) or (_quality control))%((2c reliability) or (5 reliability))%((4 safety) or (((5 safety) OR (_ safety)))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %((byquality control) or (_quality control))%((2c reliability) or (5 reliability))%((4 safety) or (((5 safety) OR (_ safety)))) and risk%22*.