Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
than daun » than bau, than daem, than days
than data » than death, loan data, can data
yang yao » yang yang, wang yan, yang yi
yang jin » yang jie, ying jin, shang jin
yang jun » yang jui, pang jun, yang judy
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 daun) OR (than data)) ((yang jin) OR (yang jun)) how ai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yao ((than daun) or (than data)) ((yang jin) OR (yang jun)) how ai ;~".
• Adding a wildcard symbol may retrieve word variants: dong yang yao ((than daun) or (than data)) ((yang jin) OR (yang jun)) how ai ;*.