Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hien hanh » dieu hanh
chinh cua » chinh ca, chinh sua, hinh cua
cua thong » cua thuong, cua khong, cua tong
cong cang » cong cong, cong lang, cong bang
cong vang » cong lang, cong quang, cong ngang
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 thong ((cong cang) OR (cong vang)) thang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hien hanh)) - hanh chinh cua thong ((cong cang) OR (cong vang)) thang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hien hanh)) - hanh chinh cua thong ((cong cang) OR (cong vang)) thang cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hien hanh)) - hanh chinh cua thong ((cong cang) OR (cong vang)) thang cau*.