Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
trinh han » trinh quan
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 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 han cong cong dan ((((toan cau) OR (toan tap))) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh trinh han cong cong dan ((((toan cau) or (toan tap))) or (toan ban))*.