Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
chin chang » china chang, chain change, china zhang
chang hadi » chang ha, khan hadi, shang hai
yang chin » yang chik, hang china, yang jin
yan guan » gan guan, yan yuan, yang guang
tan yang » dan yang, tan ying, tan yong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (lang or wan) yan ((yan guan) or (wang yuhan)) tan yang chin chang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (lang OR wan) yan ((yan guan) OR (wang yuhan)) tan yang chin chang hadi ;.
• Adding a wildcard symbol may retrieve word variants: (lang or wan) yan ((yan guan) or (wang yuhan)) tan yang chin chang hadi ;*.