Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
theo sach » thuoc sach, te sach, theo lich
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: toc ((theo sach) OR (chieu sach)) - hanh chinh cua nhung cong tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((theo sach) OR (chieu sach)) - hanh chinh cua nhung cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: toc ((theo sach) OR (chieu sach)) - hanh chinh cua nhung cong tac toan ban*.