Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu tinh » trieu tinh, lieu tinh, chau tinh
cong vang » cong quang, cong ngang, cong san
cong lang » cong luong, cong quang, cong ngang
chinh va » chinh ta, chinh tai, hanh va
va thong » va thuong, va phuong, he thong
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 (chieu tinh)) - hanh chinh va thong ((cong vang) OR (cong lang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu tinh)) - hanh chinh va thong ((cong vang) OR (cong lang)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu tinh)) - hanh chinh va thong ((cong vang) OR (cong lang)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu tinh)) - hanh chinh va thong ((cong vang) OR (cong lang)) toan cau*.