Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, anh trinh
hoc thieu » toc thieu, hoc hien
canh tinh » hanh tinh, manh tinh, canh tranh
cong cong » cong dong, trong cong, dung cong
han cong » phan cong, hang cong, hanh cong
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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: hoc thieu xanh - ((canh trinh) OR (canh tinh)) han cong cong dan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh trinh) OR (canh tinh)) han cong cong dan ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh trinh) OR (canh tinh)) han cong cong dan ((toan cau) or (toan ban))*.