Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
khong cong » thong cong, khong cang, chong cong
hieu lang » chieu sang, hieu quang, nhieu tang
dung khoi » dung khoa, dang khoi, hung khoi
ban thanh » ban hanh, ban hang
thanh tap » thanh lap, thanh tai, thanh tay
anh dung » anh dong, anh huong, sach dung
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (hieu lang)) - anh dung khoi khong cong ban thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (hieu lang)) - anh dung khoi khong cong ban thanh tap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (hieu lang)) - anh dung khoi khong cong ban thanh tap*.