Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hien hanh » dieu hanh
cong cang » cong cong, cong lang, cong bang
cong vang » cong lang, cong quang, cong ngang
thang cau » hang cau, thong cau, thanh chau
chinh ca » chinh ta, chinh va, chinh tai
ca tong » ca trong, cap tong, cua tong

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 ca tong ((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 ca tong ((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 ca tong ((cong cang) OR (cong vang)) thang cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hien hanh)) - hanh chinh ca tong ((cong cang) OR (cong vang)) thang cau*.