Perhaps you should try some spelling variations:
chen zheng » chen zhen, chen aizheng, cheng zhang
chen wang » chen yang, chen rong, chen ping
zheng fan » zhang fan, zhang fang, zheng alan
fan tong » fan along, fan cone, fan xing
tong sar » kong sar, tong a, wong sam
yang yi » yang di, yang jui
yang xi » yang di, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: chen wang ((yang yi) or (yang xi)) chen zheng fan tong sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chen wang ((yang yi) OR (yang xi)) chen zheng fan tong sar ;*.