Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
china zhang » china chang, chin chang, china han
wang kyoung » wang hyoung, hwang byoung, wang yong
kyoung yun » young yun, kyoung yang, hyoung gun
ying jin » yang jin, jing ji, yang jie
yan je » han je, yang jie
fang » lang, yang, gang

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

• Performing a fuzzy search may retrieve terms with similar spellings: fang sheng ((yan je) or (ying jin)) ((china zhang) OR (cheng zhang)) wang kyoung yun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: fang sheng ((yan je) OR (ying jin)) ((china zhang) OR (cheng zhang)) wang kyoung yun ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fang sheng ((yan je) or (ying jin)) ((china zhang) OR (cheng zhang)) wang kyoung yun ;*".