Perhaps you should try some spelling variations:
duong manh » duong van
chieu xanh » chieu sach, chieu sang, chieu tinh
chau tinh » cuu tinh, ha tinh, cua tinh
hanh tang » hanh trang, anh tang, hanh mang
cong manh » cong danh, cong thanh, hoang manh
tang cua » mang cua, hang cua, tang luan
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 ((chieu xanh) or (chau tinh)) - hanh tang cua ban ((cong manh) OR (duong manh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chau tinh)) - hanh tang cua ban ((cong manh) OR (duong manh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chau tinh)) - hanh tang cua ban ((cong manh) OR (duong manh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chau tinh)) - hanh tang cua ban ((cong manh) OR (duong manh)) toan tap*.