Perhaps you should try some spelling variations:
chin chang » china chang, chain change, china zhang
zhen shang » zhen zhang, chen shuang, shen chang
john song » john wong, john bonn, john ngosong
yan yuan » yan guan, fang yuan, nan yan
jin song » jie song, kim song, jin ying
yuan vu » tuan vu, yuan hui
wang » wing, wan, lang

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 yan yuan vu ((zhen shang) OR (chin chang)) ((jin song) OR (john song)) so ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yuan vu ((zhen shang) or (chin chang)) ((jin song) OR (john song)) so ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan yuan vu ((zhen shang) or (chin chang)) ((jin song) OR (john song)) so ;*.