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"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"aggregate functions income distribution\") OR (\"aggregate functional income distribution\"))*".
• Removing quotes may allow a broader search: (( aggregate functions income distribution ) OR ( aggregate functional income distribution ))*.