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
bang phan » bang nhan, bang thanh, quang phan
nang phan » nang phat, nang thanh, dung phan
nang quan » ban quan, nang suat
tam tong » tai tong, tam nong, tam song

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 ((bang phan) or (((nang phan) OR (nang quan)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh trung tam tong cong ((bang phan) OR (((nang phan) OR (nang quan)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - thanh trung tam tong cong ((bang phan) or (((nang phan) OR (nang quan)))) cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh trung tam tong cong ((bang phan) or (((nang phan) OR (nang quan)))) cau*.