Perhaps you should try some spelling variations:
income distribution1.3 » income distributions, income distributive
income distributional » income distributions, more distributional, income distributive
income redistribution » income distributions
2f developing » f developing, 7 developing, self developing

Try widening your search to All Fields.

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: %((((((income distributional) OR (income distribution1.3))) OR (income redistribution))) OR (income distribution)) %2f developing countries%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((((income distributional) OR (income distribution1.3))) or (income redistribution))) or (income distribution)) %2f developing countries%22".
• Adding a wildcard symbol may retrieve word variants: %((((((income distributional) OR (income distribution1.3))) or (income redistribution))) or (income distribution)) %2f developing countries%22*.