Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
chinh cua » chinh ca, chinh sua, hinh cua
cua thong » cua thuong, cua khong, cua tong
thanh ban » thanh san, thanh van, thanh bac
ban cau » bang cau, ban can, van cau

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)) - hanh chinh cua thong cong thanh ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - hanh chinh cua thong cong thanh ban cau*.