Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
cua nhung » va nhung
hanh han » hanh nhan, hanh phan, hanh san
cong san » cong tac
toan ban » van ban
han cua » hang cua, nhan cua, than cua

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 han cua nhung ((cong thanh) or (cong san)) ((toan tap) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh han cua nhung ((cong thanh) OR (cong san)) ((toan tap) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh han cua nhung ((cong thanh) or (cong san)) ((toan tap) OR (toan ban))*".