Perhaps you should try some spelling variations:
garding's inequality » hardy's inequality, young's inequality, korn's inequality
garding inequality » hardy inequality, hardy's inequality, rising inequality
warning inequality » learning inequality, widening inequality, facing inequality
learning quality » learning ability
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 ((learning quality) OR (((((((garding inequality) OR (earnings inequality))) OR (garding's inequality))) OR (warning inequality)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "wage and ((learning quality) or (((((((garding inequality) OR (earnings inequality))) or (garding's inequality))) or (warning inequality))))".
• Adding a wildcard symbol may retrieve word variants: wage and ((learning quality) or (((((((garding inequality) OR (earnings inequality))) or (garding's inequality))) or (warning inequality))))*.