Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
chang yun » chong yun, chang hsun, chae yun
yang yun » yang jun, tang yun, yang yue
yan yuan » yan guan, fang yuan, nan yan
tan yang » dan yang, tan ying, tan yong
kang hai » dang hai, kang han, shang hai
yang xi » yang di, yang yi, yang jui
xi kang » jin kang, xi zhang

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: zhang yan ((((chang yun) OR (yang yun))) OR (yan yuan)) tan yang xi kang hai ;~.
• Adding a wildcard symbol may retrieve word variants: zhang yan ((((chang yun) or (yang yun))) or (yan yuan)) tan yang xi kang hai ;*.