Perhaps you should try some spelling variations:
22income distribution » income distributional, income distributive, outcome distribution
income distributions » time distributions, discrete distributions, size 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: %((((((((22income distribution) OR (income redistribution))) OR (genome distribution))) OR (income distribution))) OR (income distributions)) %70 developing countries%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((((((22income distribution) OR (income redistribution))) or (genome distribution))) or (income distribution))) or (income distributions)) %70 developing countries%22".
• Adding a wildcard symbol may retrieve word variants: %((((((((22income distribution) OR (income redistribution))) or (genome distribution))) or (income distribution))) or (income distributions)) %70 developing countries%22*.