Perhaps you should try some spelling variations:
chai wang » chen wang
wang sang » wang yang, wang liang, wang yong
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, hong hai
chang ha » chang mae
ka chai » ka chuan, kim chai
yan ka » yang ka, yuan kai
hong » long
tan » than

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 yan ka chai wang sang minh ((((shang hai) OR (chang ha))) OR (hong tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ka chai wang sang minh ((((shang hai) OR (chang ha))) or (hong tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ka chai wang sang minh ((((shang hai) OR (chang ha))) or (hong tan)) ;*.