Perhaps you should try some spelling variations:
"aggregate functional income distribution" » "aggregate function income distribution", "aggregation functional income distribution", "aggregate fraction income distribution", "aggregate functional outcome distribution", "aggregate national income distribution", "aggregate functional genome distribution"
"aggregate functions income distribution" » "aggregation functions income distribution", "aggregate functions come distribution", "aggregate functions inline distribution", "aggregate functions inside distribution"
"aggregate functions com distribution" » "aggregation functions com distribution", "aggregate functions from distribution", "aggregate functions form distribution", "aggregate functions atom distribution", "aggregate functions co distribution", "aggregate functions cox distribution", "aggregate functions code distribution"

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