Perhaps you should try some spelling variations:
income distributional » income distribution1.3, income redistribution, more distributional
income distributions » income redistribution, time distributions, discrete distributions
genome distribution » genomic distribution, gene distribution, monomer distribution
70 developing » 10 developing, 20 developing, 30 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 (genome distribution))) OR (((income distributions) OR (income distribution)))) %70 developing countries%22.
• Adding a wildcard symbol may retrieve word variants: %((((income distributional) or (genome distribution))) or (((income distributions) or (income distribution)))) %70 developing countries%22*.