Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
cua dang » cua cong, cua ban
toan cau » toan cao, toan ban, toan tap
quan cau » quang cao, quan ha, quan cua
toan tu » toan du, tran tu, doan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh tranh cua dang cong danh ((((toan cau) or (quan cau))) or (toan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh tranh cua dang cong danh ((((toan cau) OR (quan cau))) OR (toan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh cua dang cong danh ((((toan cau) or (quan cau))) or (toan tu))*.