Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cuong cong » cong cong, luong cong, duong cong
chinh chau » chinh cau, chinh cho, minh chau
chinh phu » tinh phu, chinh cho
va cuong » van cuong, va chuong, va cong
cong dan » cong san, cong tan, huong dan
tung va » trung va, tuong va, dung va

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 (chieu sach)) - thanh tung va cuong cong dan ((chinh chau) or (chinh phu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - thanh tung va cuong cong dan ((chinh chau) OR (chinh phu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - thanh tung va cuong cong dan ((chinh chau) or (chinh phu))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - thanh tung va cuong cong dan ((chinh chau) or (chinh phu))*.