Perhaps you should try some spelling variations:
wang kyoung » wang hyoung, hwang byoung, kang young
china zhang » china chang, cheng zhang, chin chang
lang sheng » fang sheng, bing sheng, dong sheng
wang yong » wang yang, wang hyoung, wang yan
yang jin » yang jie, yang jun, ying jin
yan je » han je, yang jie

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: lang sheng ((yan je) OR (yang jin)) china zhang ((wang kyoung) OR (wang yong)) yun ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang sheng ((yan je) or (yang jin)) china zhang ((wang kyoung) OR (wang yong)) yun ;~".
• Adding a wildcard symbol may retrieve word variants: lang sheng ((yan je) or (yang jin)) china zhang ((wang kyoung) OR (wang yong)) yun ;*.