Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
manh truong » manh trung, manh tuong, anh truong
thanh thong » thanh thuong, thanh hong, thanh thang
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
long tinh » cong tinh, trong tinh, luong tin
toan tap » toan ban

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

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