Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong dan » cong tan, cong dong, cong tac
cong san » cong tac
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 - thanh trung cua nhung ((((cong dan) OR (huong dan))) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung cua nhung ((((cong dan) OR (huong dan))) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh trung cua nhung ((((cong dan) OR (huong dan))) or (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trung cua nhung ((((cong dan) OR (huong dan))) or (cong san)) than cau*.