Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
chiet tach » chieu sach
hanh trang » thanh trung, canh tranh, hanh trinh
duong manh » duong van
manh toan » thanh toan, anh tuan, tinh toan
trang va » tran van, hang va
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 ((chiet tach) or (chinh sach)) - hanh trang va nhung duong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (chinh sach)) - hanh trang va nhung duong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (chinh sach)) - hanh trang va nhung duong manh toan cau*.