Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
thien anh » thien danh, tien anh, thien thanh
cong lang » cong vang, cong luong, cong quang
lang toan » dang toan, lang thang, lang thanh
chinh ve » chinh va, chinh vi, chinh ke
ve thong » he thong, va thong, ve phong
toan cau » toan cao, toan ban, toan tap

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 (thien anh))) or (chieu xanh)) - hanh chinh ve thong cong lang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu xanh) OR (thien anh))) OR (chieu xanh)) - hanh chinh ve thong cong lang toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu xanh) OR (thien anh))) or (chieu xanh)) - hanh chinh ve thong cong lang toan cau*".