Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong dan » cong tan, cong dong, cong tac
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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 tranh cua thong ((((cong dan) OR (huong dan))) OR (cong san)) phan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh cua thong ((((cong dan) or (huong dan))) or (cong san)) phan cau*.