Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
than daun » than bau, than daem, than data
yang yao » yang yang, wang yan, yang yi
can tata » can data, can take, can tax
yang ii » yang di, yang xi, yang yi
how hai » how has, how ai, how hci
ii how » iii how

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 (can tata)) yang ii how hai ;~.
• Adding a wildcard symbol may retrieve word variants: dong yang yao ((than daun) or (can tata)) yang ii how hai ;*.