Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
khong cong » thong cong, khong cang, chong cong
cang thang » cong thanh, dang thanh
hien hanh » dieu hanh
chinh cua » chinh ca, chinh sua, hinh cua
cua khong » hua khong, cua phuong, cua thuong
cong cang » cong cong, cong lang, cong vang
thang cau » hang cau, thong cau, thanh chau

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 xanh) or (hien hanh)) - hanh chinh cua khong cong cang thang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hien hanh)) - hanh chinh cua khong cong cang thang cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hien hanh)) - hanh chinh cua khong cong cang thang cau*.