Perhaps you should try some spelling variations:
david zhang » david chang, david chan, david tang
david hand » david rand, david hardy, david chang
yuan yong » yuan ying, huan yong, kuan yong
yong hui » ong hui, wong hui, yong hoi
hui dee » hui kee, hui lee, hui nee
wang da » wang dan, cang da, wang di
di tan » dui tan, yi tan, ji tan
de di » de yi, de li, de ji
wen » when

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