Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
thieu sach » chieu sach, hieu cach, theo sach
thien hach » hien hanh
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (((thien hach) OR (thien thanh)))) - thanh trung cua dung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (((thien hach) OR (thien thanh)))) - thanh trung cua dung cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (((thien hach) OR (thien thanh)))) - thanh trung cua dung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (((thien hach) OR (thien thanh)))) - thanh trung cua dung cong dan than cau*.