Perhaps you should try some spelling variations:
tang tang » taizong tang
tang fang » zhang fang, yang fan, jing fang
fang yuan » wang yuhan, wang yan, meng yuan
yuan kai » yuan kang, yuan fei, tan kai
yang jui » yang judy, yang di
kang han » kang chen, kong hang, zhang han
yang yi » yang di
yang xi » yang di

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: tang tang fang yuan kai ((((yang yi) OR (yang jui))) OR (yang xi)) kang han ;~.
• Adding a wildcard symbol may retrieve word variants: tang tang fang yuan kai ((((yang yi) or (yang jui))) or (yang xi)) kang han ;*.