Perhaps you should try some spelling variations:
9th workshop » 4th workshop, 5th workshop, 8th workshop
core league » moore league, home league, lower league
league jan » league can, league jason, league june
9th works » math works, 9th world
jan chung » man chung, jin chung, fan chung

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 ((9th works) OR (9th workshop)) core league jan chung".
• Adding a wildcard symbol may retrieve word variants: 2008 ((9th works) OR (9th workshop)) core league jan chung*.