Perhaps you should try some spelling variations:
worlds income » worlds become, worlds come, worlds some
world income » world inside
later june » after june, cluster june, later bruner
june three » jun three, one three, line three
2008 iet » 2008 ieee

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: "2008 iet ((world income) OR (worlds income)) later june three".
• Adding a wildcard symbol may retrieve word variants: 2008 iet ((world income) OR (worlds income)) later june three*.