Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, china zhang
wang yidan » wang yan
chen zheng » chen zhen, chen aizheng, chen zhe
ming zhong » xiang zhong, min hong, ming hung
zhong zhi » zhang zhi, hong ghi, zhong tai
wang dan » wang yan, wang ban, wang yang
kang han » kang chen, kong hang, zhang han

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 yidan ((wang dan) OR (kang han)) ((cheng zhang) OR (chen zheng)) ming zhong zhi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yidan ((wang dan) or (kang han)) ((cheng zhang) OR (chen zheng)) ming zhong zhi ;~".
• Adding a wildcard symbol may retrieve word variants: wang yidan ((wang dan) or (kang han)) ((cheng zhang) OR (chen zheng)) ming zhong zhi ;*.