Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tinh » thanh binh, nhanh tinh, than kinh
thong cong » trong cong, tong cong, thong thong
manh toan » thanh toan, anh tuan, tinh toan
va thong » va thuong, va phuong, he thong
dan toan » van toan, dan than, xuan toan
tinh va » tich va, trinh van, trinh vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien danh) or (chieu xanh)) - thanh tinh va thong cong ((dan toan) OR (manh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (chieu xanh)) - thanh tinh va thong cong ((dan toan) OR (manh toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (chieu xanh)) - thanh tinh va thong cong ((dan toan) OR (manh toan)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (chieu xanh)) - thanh tinh va thong cong ((dan toan) OR (manh toan)) tap*.