Perhaps you should try some spelling variations:
"aggregate factors income distribution" » "aggregate fact income distribution", "aggregate functions income distribution", "aggregate reactions income distribution", "aggregate factor incomes distribution", "aggregate factors outcome distribution", "aggregate farmers income distribution"
"aggregate data income distribution" » "aggregate demand income distribution", "aggregate data become distribution", "aggregate data come distribution", "aggregate data informed distribution"

Try widening your search to All Fields.

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: (((("aggregate factors income distribution") OR ("aggregate data income distribution"))) OR ("aggregate factor income distribution")).
• Removing quotes may allow a broader search: (((( aggregate factors income distribution ) or ( aggregate data income distribution ))) or ( aggregate factor income distribution )).
• Adding a wildcard symbol may retrieve word variants: (((("aggregate factors income distribution") or ("aggregate data income distribution"))) or ("aggregate factor income distribution"))*.