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