Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
chua nang » chua xang, kha nang, cuu nang
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
chuc » thuc, chu, phuc

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh tang ((chua nang) OR (chuc nang)) cong dan ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang ((chua nang) OR (chuc nang)) cong dan ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang ((chua nang) OR (chuc nang)) cong dan ((toan cau) or (toan cao))*.