Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
cong hach » cong sach, cong thanh, cong khanh
anh nang » ganh nang, anh bang, anh dang
nang cua » mang cua, hang cua, nang dua
cua dung » cua dang, cua dong, qua dung
toan ban » van 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 - anh nang cua dung cong hach ((((toan cao) OR (toan tap))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - anh nang cua dung cong hach ((((toan cao) OR (toan tap))) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - anh nang cua dung cong hach ((((toan cao) OR (toan tap))) or (toan ban))*".