Perhaps you should try some spelling variations:
moderate reduction » moderate education, moderate sedation, moderated mediation
moderate recursion » moderate version, moderate discussion, more recursion
his education » arts education, history education

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: national ((his education) OR (((moderate reduction) OR (moderate recursion)))) after.
• The words AND, OR and NOT may confuse the search; try adding quotes: "national ((his education) or (((moderate reduction) OR (moderate recursion)))) after".
• Adding a wildcard symbol may retrieve word variants: national ((his education) or (((moderate reduction) OR (moderate recursion)))) after*.