Perhaps you should try some spelling variations:
persons three » personas three, lessons three, persons free
person three » personas three, version three, lesson three
2008 ieee » 2018 ieee, 2009 ieee
go league » lego league, non league, pro league
world go » world 1, world 10, world 11

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 ieee world go league ((person three) OR (persons three))".
• Adding a wildcard symbol may retrieve word variants: 2008 ieee world go league ((person three) OR (persons three))*.