Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong, khien vong
chieu sang » chieu sach, chieu xanh, hieu lang
dung phung » dung phuong, dung chung, dung nhung
hanh van » thanh van, khanh van, hanh va
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 (chieu sang)) - hanh van xay dung phung van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((khien bang) OR (chieu sang)) - hanh van xay dung phung van than cau.
• Adding a wildcard symbol may retrieve word variants: theo ((khien bang) or (chieu sang)) - hanh van xay dung phung van than cau*.