Perhaps you should try some spelling variations:
liang thanh » liang tan, long thanh, luong thanh
wang liang » wang yang
zhang ming » zhang xin
thanh van » thanh dam, thanh vu
van zhang » yan zhang, bin zhang, hao zhang
zhang kim » zhang xin, zhang i, zhang ii
song ming » song bing, song min, gong min
kang kim » kanaga kim, tan kim, yong kim

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 liang thanh van zhang ((((zhang kim) OR (kang kim))) OR (zhang ming)) song ming ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang thanh van zhang ((((zhang kim) OR (kang kim))) or (zhang ming)) song ming ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang thanh van zhang ((((zhang kim) OR (kang kim))) or (zhang ming)) song ming ;*.