Perhaps you should try some spelling variations:
dong yang » dong hoang, yang yang, dan yang
wang yong » wang hyoung, wang yan, wang shiyong
wang yang » wang yan, wang liang, wang yanling
than lang » than bling, than large, thang long
yan than » van thanh, yan zhang, yan clan
lang hai » dang hai, shang hai, hong hai
di hua » li hua

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: ((((dong yang) OR (wang yong))) OR (wang yang)) di hua (rene OR gene) yan than lang hai ;~.
• Adding a wildcard symbol may retrieve word variants: ((((dong yang) or (wang yong))) or (wang yang)) di hua (rene or gene) yan than lang hai ;*.