Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » hanh trinh, hanh trang, lanh tranh
thong cong » tong cong, thong thong, phong chong
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((hanh tranh) OR (canh tranh)) cua ((thong cong) or (trong cong)) tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh tranh) OR (canh tranh)) cua ((thong cong) OR (trong cong)) tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh tranh) OR (canh tranh)) cua ((thong cong) or (trong cong)) tan than cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh tranh) OR (canh tranh)) cua ((thong cong) or (trong cong)) tan than cau*.