Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
zhang hai » zhang dai, shang hai, zhang han
tan yang » dan yang, tan ying, tan yong
xi zhang » li zhang, xiao zhang, bin zhang
yan yan » yan yuan, nan yan, wang yan
yun tan » yun jang
yang xi » yang di, yang yi, yang jui

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