Perhaps you should try some spelling variations:
dong hoang » hong hong
yang yang » wang yang, wang yan
chen yang » chen rong
yang john » young john, king john, yang jin
john wong » john song, john bonn
fan data » can data, dan data, loan data
wong siu » wong shiu, kong siu, wong sau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong hoang) or (yang yang)) ((fan ta) OR (fan data)) chen yang john wong siu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (yang yang)) ((fan ta) OR (fan data)) chen yang john wong siu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong hoang) or (yang yang)) ((fan ta) OR (fan data)) chen yang john wong siu ;*".