Perhaps you should try some spelling variations:
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, nan yan
yi cheng » yu cheng, xi cheng, yi chang
yi chen » jui chen
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) OR (yi chen)) zhang ming jeong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yuan) or (yihan guan)) ((yi cheng) OR (yi chen)) zhang ming jeong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yuan) or (yihan guan)) ((yi cheng) OR (yi chen)) zhang ming jeong shu ;*.