Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh trong » hanh trang, anh trong, hinh trong
tong cong » trong cong, cong cong, dung cong
cac tong » cac tuong, cac cong, bac tong
cong san » cong tac
toan tai » doanh tai, toan ban, toan cao
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) OR (chinh sach)) - hanh trong cac tong cong san ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - hanh trong cac tong cong san ((toan tai) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chinh sach)) - hanh trong cac tong cong san ((toan tai) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chinh sach)) - hanh trong cac tong cong san ((toan tai) or (toan tap))*.