Perhaps you should try some spelling variations:
tang zhejiang » tang zheng
china zhang » china chang, cheng zhang, chin chang
leong tang » leung tang
china wang » china yang, china chang, china won
yang jun » yang jui, pang jun, yang jin
tong hui » wang hui
yang xi » yang di, yang yi, yang jui

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: leong tang zhejiang ((china wang) OR (china zhang)) ((yang jun) OR (yang xi)) tong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "leong tang zhejiang ((china wang) OR (china zhang)) ((yang jun) or (yang xi)) tong hui ;~".
• Adding a wildcard symbol may retrieve word variants: leong tang zhejiang ((china wang) OR (china zhang)) ((yang jun) or (yang xi)) tong hui ;*.