Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
than daun » than bau, than daem, than days
than data » than death, loan data, can data
yang mind » yang cindy, yang jin, sang minh
yang fan » zhang fan, yang dean, yang yang
how hai » how ai, how hci, how have
how has » how have

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