Perhaps you should try some spelling variations:
wuhan china » tuan china, yunnan china
china chen » china shen, china china, china chang
chen zeng » chen zheng, chen rong, chen yang
wai hoong » kai hong
wing yan » wang yan, wing tan, wang yang
wing ian » wing tan, twinn ian, wing sun
ma hong » a hong, kia hong, tan hong

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: ((wing yan) OR (wing ian)) wuhan china chen zeng ((ma hong) OR (wai hoong)) seo ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wing yan) OR (wing ian)) wuhan china chen zeng ((ma hong) or (wai hoong)) seo ;~".
• Adding a wildcard symbol may retrieve word variants: ((wing yan) OR (wing ian)) wuhan china chen zeng ((ma hong) or (wai hoong)) seo ;*.