Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
hien tach » thien hach, vien bach, hien hanh
cong cong » cong dong, trong cong, dung cong
san thanh » ban thanh, van thanh, son thanh
thanh cac » hanh cac, thanh bac, thanh ca
tung cua » trung cua, tuong cua, dung cua
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien tach) OR (chiet tach)) - thanh tung cua cong cong san thanh cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tach) OR (chiet tach)) - thanh tung cua cong cong san thanh cac*".