Perhaps you should try some spelling variations:
widening inequality » deepening inequality, reducing inequality, rising inequality
learning inequality » earnings inequality, learning quality, garding inequality
warning inequality » earnings inequality, garding inequality, facing inequality

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