Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh thanh » nhanh thanh, thanh thanh, khanh thanh
thong cong » trong cong, tong cong, thong thong
thanh hai » thanh phan, thanh san
hai thong » hai thuong, hai phong, hai trong
thanh hoa » thanh pho

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)) - hanh thanh hai thong cong ((xuan toan) or (thanh hoa)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai thong cong ((xuan toan) OR (thanh hoa)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai thong cong ((xuan toan) or (thanh hoa)) cao".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai thong cong ((xuan toan) or (thanh hoa)) cao*.