Perhaps you should try some spelling variations:
income distributional » income distribution1.3, more distributional, income distributive
income distributions » time distributions, discrete distributions, size distributions
2f developing » f developing, self developing, turf 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 redistribution) OR (income distributions))))) OR (income distribution)) %2f developing countries%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((income distributional) or (((income redistribution) OR (income distributions))))) or (income distribution)) %2f developing countries%22".
• Adding a wildcard symbol may retrieve word variants: %((((income distributional) or (((income redistribution) OR (income distributions))))) or (income distribution)) %2f developing countries%22*.