Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
huong tin » thuong tin, phuong tien, khuong tinh
luong tin » thong tin, luong tai, luong thi
dung cong » dung trong
cong cac » cuong cac, cong tac, cong cau
cac van » cac dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu xanh) OR (chieu sang)) - thanh ((huong tin) or (luong tin)) dung cong cac van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (chieu sang)) - thanh ((huong tin) OR (luong tin)) dung cong cac van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) OR (chieu sang)) - thanh ((huong tin) or (luong tin)) dung cong cac van ban*".