Perhaps you should try some spelling variations:
garding's inequality » hardy's inequality, young's inequality, korn's inequality
learning inequality » learning quality, measuring inequality, deepening inequality
garding inequality » hardy inequality, hardy's inequality, rising inequality
earnings » warning

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: (wage OR wave) AND ((learning inequality) OR (((((garding inequality) OR (garding's inequality))) OR (earnings inequality))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wage OR wave) and ((learning inequality) or (((((garding inequality) or (garding's inequality))) or (earnings inequality))))*".