Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
trong tap » trong thap, tong tap, trong tan
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
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 hien nhanh - hanh tranh ((cua dung) OR (cua dong)) trong tap ((toan cau) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh tranh ((cua dung) or (cua dong)) trong tap ((toan cau) or (toan cao))*.