Perhaps you should try some spelling variations:
wang yangming » wang yangming's, wang yanling, wang danning
wuhan china » tuan china, yunnan china
than china » tuan china, han china, can china
yang boon » ong boon
chong hai » chong nam, chong wan, chong yah
dan yang » daun yang, tan yang, wang yang
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: wang yangming ((than china) OR (wuhan china)) dan yang boon ((chong hai) OR (hong hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yangming ((than china) or (wuhan china)) dan yang boon ((chong hai) OR (hong hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yangming ((than china) or (wuhan china)) dan yang boon ((chong hai) OR (hong hai)) ;*.