Perhaps you should try some spelling variations:
chih zheng » chen zheng, chih hang
zheng rong » chen rong
yang yang » wang yang, wang yan
yang dang » yang guang, yang liang, yang dean
dang hadi » dang hai
hadi chih » hai chih
chong shu » cong shu
chong suk » chong yun, cong sun, yong suk

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang yang dang hadi chih zheng rong ((chong shu) or (chong suk)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yang dang hadi chih zheng rong ((chong shu) OR (chong suk)) ;*.