Perhaps you should try some spelling variations:
joon chang » hoong chang, boon chong, jin chang
yang joon » kyung joon, yang jun
chang won » chang soon, chang ann, chang min
dang hadi » dang hai
won chen » don chen, wong chun, goh chen
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang yi
yang xi » yang yi

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: yang joon chang won chen ((yang jin) OR (((((yang xi) OR (yang jui))) OR (yang di)))) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: yang joon chang won chen ((yang jin) or (((((yang xi) or (yang jui))) or (yang di)))) dang hadi ;*.