Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
wang yidan » wang yan
chang chen » chang ch'un, chang chuan, change when
zhang xin » zhang jian, zhang ming, zhang fan
wang dan » wang yan, wang ban, wang yang
xin hong » tin hong, min hong, xie hong
hong zhi » zhong zhi, hong ghi, zhang zhi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yidan ((wang dan) or (chang chen)) cheng zhang xin hong zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan ((wang dan) OR (chang chen)) cheng zhang xin hong zhi ;*.