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