Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
than days » than daem
than data » than death, loan data, can data
yang yao » yang yang, wang yan, yang yi
yang sun » yang jun, yang yun, gang sung
sun how » gun 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 yao ((than days) OR (than data)) yang sun how ai ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang yao ((than days) or (than data)) yang sun how ai ;*.