Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, fang yuan
wang yidan » wang yan
chen zhang » cheng zhang, zhen zhang, chen zheng
zhang minh » zhang ming, zhang xin, chang min
minh hong » minh cong, min hong, linh hoang
hua chen » jui chen, yu chen, a chen
hong ghi » zhong zhi, hong g, hong hai

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) or (wang yidan)) wang hua chen zhang minh hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yuhan) OR (wang yidan)) wang hua chen zhang minh hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yuhan) or (wang yidan)) wang hua chen zhang minh hong ghi ;*.