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

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: wave AND ((learning inequality) OR (((garding inequality) OR (garding's inequality)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "wave and ((learning inequality) or (((garding inequality) OR (garding's inequality))))".
• Adding a wildcard symbol may retrieve word variants: wave and ((learning inequality) or (((garding inequality) OR (garding's inequality))))*.