Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang chai » wang chau, yang chik, yang hui
sang minh » kang minah, anh minh, song min
shang hai » shang kai, dang hai, chang ha
wan yang » wang yang, dan yang, tan yang
chai tan » chai tam, chai onn
tan sang » tan yang, tang tang, tan hong
hong hai » zhong tai, dang hai, hong tan

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: wan yang yang chai tan sang minh ((hong hai) OR (shang hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wan yang yang chai tan sang minh ((hong hai) or (shang hai)) ;*.