Perhaps you should try some spelling variations:
phuong danh » phuong anh, phuong dinh, phuong hanh
dung phuong » dung thuong, bang phuong, dung chung
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
hoc dieu » hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban
toan tap » toan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - hanh tranh cua dung phuong danh ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - hanh tranh cua dung phuong danh ((toan cao) OR (toan tap))*.