Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
yuan wang » yan wang, yuan kang, qian wang
wang fang » wang yang, weng fang, wang liang
fang yuan » wang yuhan, wang yan, meng yuan
chang han » chang ha, cheng han, zhang han
yang yan » yang yang, wang yan, yang fan

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 ((yang yan) OR (yang dean)) yuan wang fang yuan chang han ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yang yan) or (yang dean)) yuan wang fang yuan chang han ;*.