Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
ka chuan » say chuan, hai chuan
tan sang » tan yang, tang tang, tan hong
long tan » hong tan, long han, long thanh
ka chai » kim chai
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 yan ((ka chai) OR (ka chuan)) tan sang minh ((shang hai) OR (long tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((ka chai) OR (ka chuan)) tan sang minh ((shang hai) or (long tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ((ka chai) OR (ka chuan)) tan sang minh ((shang hai) or (long tan)) ;*.