Perhaps you should try some spelling variations:
income distributions » income distribution, income redistribution, discrete distributions
genome distribution » genomic distribution, gene distribution, monomer distribution
time distributions » time distribution, size distributions, stable distributions
self developing » relief developing, self development, level developing
2f developing » f developing, 2.3 developing, 2.2 developing
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: %((genome distribution) OR (((income distributions) OR (time distributions)))) %((((2f developing) OR (self developing))) OR (70 developing)) countries%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((genome distribution) or (((income distributions) or (time distributions)))) %((((2f developing) OR (self developing))) or (70 developing)) countries%22".
• Adding a wildcard symbol may retrieve word variants: %((genome distribution) or (((income distributions) or (time distributions)))) %((((2f developing) OR (self developing))) or (70 developing)) countries%22*.