Perhaps you should try some spelling variations:
yuhan zhang » yan zhang, yuan chang, yuehong zhang
wang yuhan » wang luhang, wang yan, wang yidan
zhang jian » zhang fan, shang jin
zhang ming » zhang xin
jian she » can she, jia shen, jiao shi
chan eng » chan fong, chan kang, chan ming
hong g » hong ng, hong w, hong 7

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yuhan zhang jian she ((chan eng) or (zhang ming)) hong g ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yuhan zhang jian she ((chan eng) OR (zhang ming)) hong g ;*.