Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu sach » chieu sach, dien sach, te sach
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
nhan cach » phan cac
cong tac » cong ty
khan ap » khan cap, han ap, khan dam

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 cua thong ((cong san) or (cong tac)) ((nhan cach) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh trung cua thong ((cong san) OR (cong tac)) ((nhan cach) OR (khan ap)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh trung cua thong ((cong san) or (cong tac)) ((nhan cach) or (khan ap))*.