Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
yuhan kai » yuan kai
shang hai » shang kai, chang ha, hong hai
kai chai » ka chai, goi chai, kim chai
chai dan » chai onn, chai tam, shi dan
dan ying » dan qing, dan yang, fan ying
ying jin » yang jin, jing ji, yang jie

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 yuhan kai chai dan ying jin ((dang hai) OR (shang hai)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yuhan kai chai dan ying jin ((dang hai) or (shang hai)) ;*.