Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
cong tac » cong ty
cong nam » dong nam, uong nam, thong nam
toan tap » toan ban

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 - thanh ((tinh cua) OR (trinh cua)) nhung ((cong tac) or (cong nam)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((tinh cua) OR (trinh cua)) nhung ((cong tac) OR (cong nam)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh ((tinh cua) OR (trinh cua)) nhung ((cong tac) or (cong nam)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((tinh cua) OR (trinh cua)) nhung ((cong tac) or (cong nam)) toan tap*.