Perhaps you should try some spelling variations:
yang wang » yang yang, yan wang, yang guang
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
yan chai » ka chai, yan clan, yan zhi
chai dan » chai onn, chai tam, shi dan
dan sang » dan yang, dan dana, dan qing
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: yang wang yan chai dan sang minh ((shang hai) OR (hong tan)) ;~.
• Adding a wildcard symbol may retrieve word variants: yang wang yan chai dan sang minh ((shang hai) or (hong tan)) ;*.