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
boon chong » boon siong
joon chang » hoong chang, jin chang, woo chang
dan yang » daun yang, tan yang, wang yang

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) OR (joon chang)) 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) OR (joon chang)) hai ;~".
• Adding a wildcard symbol may retrieve word variants: wang yangming ((than china) or (wuhan china)) dan yang ((boon chong) OR (joon chang)) hai ;*.