Perhaps you should try some spelling variations:
dong hoang » hong hong
yang cindy » yang mind
than data » than death, loan data, can data
hoang ka » hoang vu, hoang sy, hoang _
than bau » than bad, than a, than you
how ai » how aid, how am, how asia
how ae » how age, how am, how case

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 ka ((than bau) OR (than data)) yang cindy ((how ai) OR (how ae)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong hoang ka ((than bau) or (than data)) yang cindy ((how ai) OR (how ae)) ;~".
• Adding a wildcard symbol may retrieve word variants: dong hoang ka ((than bau) or (than data)) yang cindy ((how ai) OR (how ae)) ;*.