Perhaps you should try some spelling variations:
duong manh » duong van
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tran » hanh trang, thanh tran, hanh tram
cong manh » cong danh, cong thanh, hoang manh
tran van » luan van
van dung » van dong, xay dung, tin dung
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 ((chieu xanh) or (chinh sach)) - hanh tran van dung ((cong manh) OR (duong manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chinh sach)) - hanh tran van dung ((cong manh) OR (duong manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chinh sach)) - hanh tran van dung ((cong manh) OR (duong manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chinh sach)) - hanh tran van dung ((cong manh) OR (duong manh)) toan cau*.