Perhaps you should try some spelling variations:
yuhan cheng » yuan cheng, yunnan sheng
wang yuhan » wang luhang, wang yan, wang yidan
cheng wong » cheng leong, chen rong, chen wang
yan yuan » yan guan, fang yuan, nan yan
wong siu » wong shiu, kong siu, wong sau
wan yan » wang yan, nan yan, wang yang
wai yan » wang yan, wei yang
sin » sign, sind, skin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((wan yan) OR (wai yan))) or (dong sin)) ((ya yuan) or (yan yuan)) wang yuhan cheng wong siu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wan yan) OR (wai yan))) OR (dong sin)) ((ya yuan) OR (yan yuan)) wang yuhan cheng wong siu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wan yan) OR (wai yan))) or (dong sin)) ((ya yuan) or (yan yuan)) wang yuhan cheng wong siu ;*".