Perhaps you should try some spelling variations:
garding's inequality » earnings inequality, hardy's inequality, young's inequality
widening inequality » deepening inequality, reducing inequality, rising inequality
learning inequality » earnings inequality, learning quality, measuring inequality
garding inequality » earnings inequality, hardy inequality, hardy's inequality
wage » wave

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