Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong danh » cuong danh, cong dan, cong khanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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 hien xanh - hanh tranh cua thong ((cong danh) OR (cong thanh)) ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tranh cua thong ((cong danh) OR (cong thanh)) ((toan cau) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh cua thong ((cong danh) OR (cong thanh)) ((toan cau) or (toan tap))*.