Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
thanh van » thanh dam, thanh vu
than data » than death, loan data, can data
ying jin » yang jin, jing ji, yang jie
yang ka » yang fan, yang yao
jin how » john how
how ai » how aid, how ae, how am

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 ka ((thanh van) OR (than data)) ying jin how ai ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang ka ((thanh van) or (than data)) ying jin how ai ;*.