Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
chen zhang » zhen zhang, chen zheng, chen shuang
ming jeong » ming kong
min jeong » kin keong, min hong, mun leong
yan yi » yang yi, tan yi, yin yi
yan zi » yan zhi, yuan zi, ban zi
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 ((yan yi) OR (yan zi)) ((chen zhang) OR (cheng zhang)) ((ming jeong) OR (min jeong)) su ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((yan yi) or (yan zi)) ((chen zhang) OR (cheng zhang)) ((ming jeong) or (min jeong)) su ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ((yan yi) or (yan zi)) ((chen zhang) OR (cheng zhang)) ((ming jeong) or (min jeong)) su ;*.