Perhaps you should try some spelling variations:
yihan guan » yan guan
zhang jian » zhang fan, shang jin
zhang xin » zhang ming, zhang fan, zhang yan
jeong shu » jeong su, cong shu
yan yuan » yan guan, fang yuan, nan yan
li chen » 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)) li chen ((zhang xin) OR (zhang jian)) jeong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yuan) or (yihan guan)) li chen ((zhang xin) OR (zhang jian)) jeong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yuan) or (yihan guan)) li chen ((zhang xin) OR (zhang jian)) jeong shu ;*.