Perhaps you should try some spelling variations:
income distributions » income redistribution, time distributions, discrete distributions
turf developing » stuff developing, future developing, tariff developing
762 developing » 7.2 developing, 2 developing, 12 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 distribution) OR (income distributions)) %((turf developing) OR (762 developing)) countries%22.
• Adding a wildcard symbol may retrieve word variants: %((income distribution) or (income distributions)) %((turf developing) or (762 developing)) countries%22*.