Perhaps you should try some spelling variations:
david chang » david ching, david chan, david chieng
david zhang » david chan, david hand, david tang
yuan yong » yuan ying, huan yong, kuan yong
yong hoi » yong ho, yong han, seng hoi
suan wen » san wen, yuan wen, juan wen
neng da » neng de, neng fa, neng yan
ji suan » ji xuan, ji yuan, ji quan
ee ji » lee ji, de ji, ke ji

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 hoi ee ((david chang) or (david zhang)) neng da xi. ) or ( yuan yong hoi ee ji suan wen da xi. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( yuan yong hoi ee ((david chang) OR (david zhang)) neng da xi. ) OR ( yuan yong hoi ee ji suan wen da xi. )).
• Adding a wildcard symbol may retrieve word variants: (( yuan yong hoi ee ((david chang) or (david zhang)) neng da xi. ) or ( yuan yong hoi ee ji suan wen da xi. ))*.