Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
than bau » than bad, than a, than you
can data » can tata, dan data, fan data
yang jin » yang jie, yang jun, ying jin
jin kang » jin chang, jin kyung, jing fang
kang hai » dang hai, kang han, shang hai

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 yang ((than bau) OR (can data)) yang jin kang hai ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang yang ((than bau) or (can data)) yang jin kang hai ;*.