Perhaps you should try some spelling variations:
than data » than death, loan data, can data
dong yang » dong hoang, wang yang, yang yang
sang myth » sang minh
yang yao » yang yang, wang yan, yang yi
than bau » than a, than you, than big
than bad » than a, than big, than law
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 yao ((((than bau) OR (than bad))) OR (than data)) sang myth how ai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yao ((((than bau) OR (than bad))) or (than data)) sang myth how ai ;~".
• Adding a wildcard symbol may retrieve word variants: dong yang yao ((((than bau) OR (than bad))) or (than data)) sang myth how ai ;*.