Perhaps you should try some spelling variations:
china shang » china chang, china zhang, china shaping
chen zheng » chen zhen, chen aizheng, cheng zhang
hai phong » bai chong, kai hong
hai cong » pham cong, bai chong, yan cong
wu xiao » hu xiao
yuan di » yuan li, yuan fei, juan die
yuan zi » yan zi, yuan li, yuan fei

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wu xiao ((yuan di) OR (yuan zi)) ((china shang) or (chen zheng)) ((hai cong) or (hai phong)) shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wu xiao ((yuan di) OR (yuan zi)) ((china shang) OR (chen zheng)) ((hai cong) OR (hai phong)) shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wu xiao ((yuan di) OR (yuan zi)) ((china shang) or (chen zheng)) ((hai cong) or (hai phong)) shu ;*".