Perhaps you should try some spelling variations:
income distributional » income distribution1.3, income redistribution, more distributional
income distributions » income redistribution, time distributions, discrete distributions
turf developing » stuff developing, future developing, tariff developing
2.2 developing » 12.2 developing, 22 developing, 5.2 developing
2f developing » f developing, 7 developing, self developing

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 distribution))) OR (income distributions)) %((((2f developing) OR (2.2 developing))) OR (turf developing)) countries%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((income distributional) or (income distribution))) or (income distributions)) %((((2f developing) OR (2.2 developing))) or (turf developing)) countries%22".
• Adding a wildcard symbol may retrieve word variants: %((((income distributional) or (income distribution))) or (income distributions)) %((((2f developing) OR (2.2 developing))) or (turf developing)) countries%22*.