Perhaps you should try some spelling variations:
china chen » china shen, china china, china chang
chen chung » chen chuling, chen shuang, chen chuan
chung hong » chung chong, chung tong, change hong
wang yang » wang yan, wang yanling
yang yang » wang yan
hong wong » hong kong, hong jong, hong hong
wong yue » wang yue, hong yu

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 ((((wang yang) OR (wang liang))) OR (yang yang)) china chen chung hong wong yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((wang yang) OR (wang liang))) or (yang yang)) china chen chung hong wong yue ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((((wang yang) OR (wang liang))) or (yang yang)) china chen chung hong wong yue ;*.