Perhaps you should try some spelling variations:
yang dewan » yang dean, wang dewen
yang qian » yang qixian, yang liang, yang dean
siu cheng » siu cheung, su cheng, yu cheng
cheng chu » cheng lu
chu quang » chu yuan
cuong van » duong van
cong van » congo can, duong van, cong sun

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: (wan OR lang) ((yang qian) OR (yang dewan)) siu cheng chu quang ((cuong van) OR (cong van)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wan or lang) ((yang qian) or (yang dewan)) siu cheng chu quang ((cuong van) OR (cong van)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wan or lang) ((yang qian) or (yang dewan)) siu cheng chu quang ((cuong van) OR (cong van)) ;*.