Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
yang john » young john, king john, yang jin
john song » john wong, john bonn, john ngosong
than bau » than bad, than a, than you
can data » can tata, dan data, fan data
song hai » hong hai, shang hai, dang 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 john song hai ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang yang ((than bau) or (can data)) yang john song hai ;*.