Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, china zhang
chen zheng » chen zhen, chen aizheng, chen zhe
ming jeong » ming kong
min jeong » kin keong, min hong, mun leong
lang yan » wang yan, wang yang, zhang yan
yan yi » yang yi, tan yi, yin yi
yan zi » yan zhi, yuan zi, ban zi

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 yan ((yan yi) OR (yan zi)) ((cheng zhang) OR (chen zheng)) ((ming jeong) OR (min jeong)) su ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan ((yan yi) or (yan zi)) ((cheng zhang) OR (chen zheng)) ((ming jeong) or (min jeong)) su ;~".
• Adding a wildcard symbol may retrieve word variants: lang yan ((yan yi) or (yan zi)) ((cheng zhang) OR (chen zheng)) ((ming jeong) or (min jeong)) su ;*.