Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trang » thanh trung, canh tranh, hanh trinh
van dung » van dong, xay dung, tin dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
va dung » va duong, vat dung, va ung

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 tinh) or (chinh sach)) - hanh trang ((va dung) OR (van dung)) cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chinh sach)) - hanh trang ((va dung) OR (van dung)) cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (chinh sach)) - hanh trang ((va dung) OR (van dung)) cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chinh sach)) - hanh trang ((va dung) OR (van dung)) cong san toan cau*.