Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
dang cong » dung cong
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 - hanh tranh cua ((dang cong) OR (thong cong)) dan ((toan cau) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tranh cua ((dang cong) or (thong cong)) dan ((toan cau) or (toan cao))*.