Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
than daun » than bau, than daem, than data
yang john » young john, king john, yang jin
can data » can tata, dan data, fan data
john how » john hope, john holt, john hook
how hai » how has, how ai, how hci

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 yang) OR (yang yang)) yao ((than daun) OR (can data)) yang john how hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) OR (yang yang)) yao ((than daun) or (can data)) yang john how hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) OR (yang yang)) yao ((than daun) or (can data)) yang john how hai ;*.