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