Perhaps you should try some spelling variations:
fang sudan » fang sidun, fang yuan, fund sudan
sudan chen » sudan ch
chin fang » chin chang, china wang, china yang
dang hadi » dang hai
wan chin » wen chin, can china, van chien
yang jun » yang jui, pang jun, yang jin
yang xi » yang yi, yang jui

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: wan chin fang sudan chen ((((((yang jun) OR (yang judy))) OR (yang di))) OR (yang xi)) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: wan chin fang sudan chen ((((((yang jun) or (yang judy))) or (yang di))) or (yang xi)) dang hadi ;*.