Perhaps you should try some spelling variations:
zhang ming » zhang xin
ban thanh » van thanh, binh thanh, tran thanh
thanh van » thanh dam, thanh vu
van zhang » yan zhang, bin zhang, hao zhang
gong meng » gong gang
wang ban » wang yan, wang dan, wang yang
kang kim » kanaga kim, tan kim, yong kim
gong min » jong min, song min, song ming

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