Perhaps you should try some spelling variations:
measuring inequality » measuring quality
hardy's inequality » holder's inequality, harnack inequality
hardy inequality » hardy inequalities, harnack inequality
earnings » learning

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