Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trang » thanh trung, hanh trinh, minh trang
duoc hien » duoc thien, duoc dien, duoc bien
hien hanh » dieu hanh
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
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: duoc hien hanh - ((hanh trang) OR (canh tranh)) cua nhung cong dan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "duoc hien hanh - ((hanh trang) OR (canh tranh)) cua nhung cong dan ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: duoc hien hanh - ((hanh trang) OR (canh tranh)) cua nhung cong dan ((toan cao) or (toan tap))*.