Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, dieu hanh, hien hanh
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: doi ((((hieu manh) OR (hieu nganh))) or (chieu sach)) - hanh trang va nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((hieu manh) OR (hieu nganh))) OR (chieu sach)) - hanh trang va nhung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((((hieu manh) OR (hieu nganh))) or (chieu sach)) - hanh trang va nhung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((((hieu manh) OR (hieu nganh))) or (chieu sach)) - hanh trang va nhung cong dan toan cau*.