Perhaps you should try some spelling variations:
thanh van » thanh dam, thanh vu
van zhang » yan zhang, bin zhang, hao zhang
zhang kim » zhang i, zhang ii, zhang jin
zhang xin » zhang jian, zhang ming, zhang fan
kang kim » kanaga kim, tan kim, yong kim
gong min » jong min, song min, gong meng
wang » wing, wan, lang

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: wang yanling thanh van zhang ((((zhang kim) OR (kang kim))) OR (zhang xin)) gong min ;~.
• Adding a wildcard symbol may retrieve word variants: wang yanling thanh van zhang ((((zhang kim) or (kang kim))) or (zhang xin)) gong min ;*.