Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
than bau » than bad, than a, than you
can data » can tata, dan data, fan data
yang jin » yang jun, ying jin, shang jin
yang jie » yang di, yang jui, yang xi
yang ka » yang fan, yang yao
how hai » how has, how ai, how hci

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