Perhaps you should try some spelling variations:
garding's inequality » garding inequality, hardy's inequality, young's inequality
learning inequality » learning quality, garding inequality, measuring inequality
rising inequality » reducing inequality, increasing inequality, addressing inequality
wage » wave
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 AND ((learning inequality) OR (((((rising inequality) OR (garding's inequality))) OR (earnings inequality)))).
• Adding a wildcard symbol may retrieve word variants: wage and ((learning inequality) or (((((rising inequality) or (garding's inequality))) or (earnings inequality))))*.