Perhaps you should try some spelling variations:
wang ying » wang yang, wang yong, wang jing
ying yang » yang yang, yin yang, ying chang
yun jang » suk jang
yun song » hyun song, yun young, jin song
yong cai » dong cao, yong c, yong wah
fang hay » dang hai, fang a, kang han
eang hay » dang hai, kang 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 ying yang ((yun jang) OR (yun song)) yong cai ((fang hay) OR (eang hay)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ying yang ((yun jang) OR (yun song)) yong cai ((fang hay) or (eang hay)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ying yang ((yun jang) OR (yun song)) yong cai ((fang hay) or (eang hay)) ;*.