Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
chinh quan » chinh luan, chinh quyen, chinh ngan
quan thong » quang thong, quan trong, xuan thong
thong cong » trong cong, tong cong, thong thong
cong tan » cong tac, cong san, cong thanh
ban cau » bang cau, van cau, ban dau
ban can » ban dan, ban hang, ban hanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien hach)) - hanh chinh quan thong cong tan ((ban cau) OR (ban can))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - hanh chinh quan thong cong tan ((ban cau) or (ban can))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - hanh chinh quan thong cong tan ((ban cau) or (ban can))*.