Perhaps you should try some spelling variations:
fang yuhan » fang yuan, wang yuhan
yang jing » wang jing, yang jin, huang jing
jing fang » jia fang, jin kang, weng fang
kang chen » chang chen, jane chen, tang chun
yang jui » yang judy, yang xi, yang yi
kang hay » eang hay, dang hai, kang tae
kang han » kong hang, zhang han, dang hai

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: yang jing fang yuhan dan ((yang jui) OR (yang di)) ((kang hay) OR (((kang han) OR (kang chen)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang jing fang yuhan dan ((yang jui) or (yang di)) ((kang hay) or (((kang han) OR (kang chen)))) ;~".
• Adding a wildcard symbol may retrieve word variants: yang jing fang yuhan dan ((yang jui) or (yang di)) ((kang hay) or (((kang han) OR (kang chen)))) ;*.