Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu sach » chieu sach, dien sach, te sach
tong cong » trong cong, cong cong, dung cong
tam tong » tai tong, tam nong, tam song
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh trung tam tong cong dan ((than cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - thanh trung tam tong cong dan ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh trung tam tong cong dan ((than cau) OR (toan cau))*.