Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, truong thanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong ty
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: doi ((dieu hanh) or (chieu sach)) - thanh trung cua thong ((cong tan) OR (cong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((dieu hanh) OR (chieu sach)) - thanh trung cua thong ((cong tan) OR (cong thanh)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((dieu hanh) or (chieu sach)) - thanh trung cua thong ((cong tan) OR (cong thanh)) toan tap*".