Perhaps you should try some spelling variations:
yang wang » yang yang, yan wang, yang guang
sang minh » kang minah, anh minh, song min
hong than » hong tan, long thanh
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 hai » shang hai, zhong tai, dang hai

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 ((hong hai) OR (hong than)) ;~.
• Adding a wildcard symbol may retrieve word variants: yang wang yan chai dan sang minh ((hong hai) or (hong than)) ;*.