Perhaps you should try some spelling variations:
deepening inequality » explaining inequality, measuring inequality, reducing inequality
garding inequality » garding's inequality, hardy inequality, rising inequality
hardy's inequality » hardy inequality, harnack inequality
wage » wave
earnings » learning, 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 ((deepening inequality) OR (((((garding inequality) OR (((hardy's inequality) OR (holder's inequality))))) OR (earnings inequality)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "wage and ((deepening inequality) or (((((garding inequality) or (((hardy's inequality) OR (holder's inequality))))) or (earnings inequality))))".
• Adding a wildcard symbol may retrieve word variants: wage and ((deepening inequality) or (((((garding inequality) or (((hardy's inequality) OR (holder's inequality))))) or (earnings inequality))))*.