Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
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: hoc ((chieu sach) OR (chiet tach)) - ((thanh trung) or (canh tranh)) cua tong cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - ((thanh trung) OR (canh tranh)) cua tong cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - ((thanh trung) or (canh tranh)) cua tong cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - ((thanh trung) or (canh tranh)) cua tong cong tac toan ban*.