Perhaps you should try some spelling variations:
22income distribution » income redistribution, income distributional, income distributive
monomer distribution » money distribution, isomer distribution, polymer distribution
income distributions » income redistribution, time distributions, discrete distributions
genome distribution » genomic distribution, gene distribution, some distribution
762 developing » 7.2 developing, 2 developing, 12 developing
72 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: %((((((22income distribution) OR (income distribution))) OR (((genome distribution) OR (monomer distribution))))) OR (income distributions)) %((72 developing) OR (762 developing)) countries%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((((22income distribution) OR (income distribution))) or (((genome distribution) or (monomer distribution))))) or (income distributions)) %((72 developing) or (762 developing)) countries%22".
• Adding a wildcard symbol may retrieve word variants: %((((((22income distribution) OR (income distribution))) or (((genome distribution) or (monomer distribution))))) or (income distributions)) %((72 developing) or (762 developing)) countries%22*.