Perhaps you should try some spelling variations:
david cheng » david chieng, david ching, david chang
yuan yong » yuan ying, huan yong, kuan yong
dye david » rye david, dole david, lee david
cheng bei » cheng kai, cheng ee, cheng lee
yong hui » ong hui, wong hui, yong hoi
ji suan » ji xuan, ji yuan, ji quan
ji san » di san, ci san, ji shang

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 hui dye david cheng bei da xi. ) or ( yuan yong hui de ((ji san) OR (ji suan)) wen da xi. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( yuan yong hui dye david cheng bei da xi. ) OR ( yuan yong hui de ((ji san) OR (ji suan)) wen da xi. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( yuan yong hui dye david cheng bei da xi. ) or ( yuan yong hui de ((ji san) OR (ji suan)) wen da xi. ))".
• Adding a wildcard symbol may retrieve word variants: (( yuan yong hui dye david cheng bei da xi. ) or ( yuan yong hui de ((ji san) OR (ji suan)) wen da xi. ))*.