Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
trang va » tran van, hang va
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: hoc ((thieu xanh) or (hieu manh)) - hanh trang va ((dung cong) or (dang cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - hanh trang va ((dung cong) OR (dang cong)) van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - hanh trang va ((dung cong) or (dang cong)) van toan cau*.