Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong, khien vong
dung phung » dung phuong, dung chung, dung nhung
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dang » hanh dong, anh dang, hanh dung
dang xay » dang van, van xay
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((khien bang) or (hieu lang)) - hanh dang xay dung phung van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((khien bang) OR (hieu lang)) - hanh dang xay dung phung van than cau.
• Adding a wildcard symbol may retrieve word variants: theo ((khien bang) or (hieu lang)) - hanh dang xay dung phung van than cau*.