Perhaps you should try some spelling variations:
david chang » david ching, david zhang, david chieng
david chan » david ching, david cohen
yuan yong » yuan ying, huan yong, kuan yong
yong chan » yong chean, yong chuan, yong chang
yong han » yong chean, yong heng
chan de » chang de, chan e, zhan de
san wen » tan wen

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( yuan yong chan de ((david chang) OR (david chan)) wen da xi. ) or ( yuan yong han ((de yi) or (de la)) san wen da xi. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( yuan yong chan de ((david chang) OR (david chan)) wen da xi. ) OR ( yuan yong han ((de yi) OR (de la)) san wen da xi. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( yuan yong chan de ((david chang) OR (david chan)) wen da xi. ) or ( yuan yong han ((de yi) or (de la)) san wen da xi. ))".
• Adding a wildcard symbol may retrieve word variants: (( yuan yong chan de ((david chang) OR (david chan)) wen da xi. ) or ( yuan yong han ((de yi) or (de la)) san wen da xi. ))*.