Perhaps you should try some spelling variations:
young john » kong john, wong john, young jean
dong hoang » hong hong
yang yang » wang yang, wang yan
yang john » king john, yang jin, yang jun
wong siu » wong shiu, kong siu, wong sau
ta chen » a chen, hua chen
fan ta » fan data

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (yang yang)) fan ta chen ((yang john) OR (young john)) wong siu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong hoang) or (yang yang)) fan ta chen ((yang john) OR (young john)) wong siu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong hoang) or (yang yang)) fan ta chen ((yang john) OR (young john)) wong siu ;*.