Perhaps you should try some spelling variations:
chieu manh » chieu xanh, chu manh, chieu sach
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh dung » thanh dung, anh dung, hanh dong
tong cong » cong cong, dung cong, dang cong
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu manh) OR (hieu manh)) - hanh dung luan ((tong cong) or (trong cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu manh) OR (hieu manh)) - hanh dung luan ((tong cong) OR (trong cong)) van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu manh) OR (hieu manh)) - hanh dung luan ((tong cong) or (trong cong)) van toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu manh) OR (hieu manh)) - hanh dung luan ((tong cong) or (trong cong)) van toan cau*.