Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
yihan guan » yan guan
xin jeong » kin keong, xin tong
min jeong » kin keong, min hong, mun leong
yan yuan » yan guan, fang yuan, nan yan
yi cheng » yi chen, yu cheng, xi cheng
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) OR (yihan guan)) yi cheng zhang ((xin jeong) OR (min jeong)) shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yuan) or (yihan guan)) yi cheng zhang ((xin jeong) OR (min jeong)) shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yuan) or (yihan guan)) yi cheng zhang ((xin jeong) OR (min jeong)) shu ;*.