Perhaps you should try some spelling variations:
china zhang » china chang, cheng zhang, chin chang
zhang huang » zhang huafeng, zhang shufang, zhang fang
van thanh » tran thanh, phan thanh, lam thanh
jin chang » chin chang, joon chang, ying chang
yan than » yan zhang, yan clan, yan guan
yi chang » ii chang, ying chang, vii chang

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: nan ((yan than) OR (van thanh)) china zhang huang ((jin chang) OR (yi chang)) hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nan ((yan than) OR (van thanh)) china zhang huang ((jin chang) or (yi chang)) hui ;~".
• Adding a wildcard symbol may retrieve word variants: nan ((yan than) OR (van thanh)) china zhang huang ((jin chang) or (yi chang)) hui ;*.