Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
chan cau » phan cau, chinh cau, nhanh cau
can cau » van cau, ban cau, ca cau

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 - canh tranh cua ((nhung cong) or (tong cong)) dan ((chan cau) OR (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh cua ((nhung cong) OR (tong cong)) dan ((chan cau) OR (can cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - canh tranh cua ((nhung cong) or (tong cong)) dan ((chan cau) OR (can cau))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh cua ((nhung cong) or (tong cong)) dan ((chan cau) OR (can cau))*.