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