Perhaps you should try some spelling variations:
hanh trinh » canh tranh
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu manh - ((hanh trinh) OR (hanh chinh)) quan nhung cong dan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - ((hanh trinh) OR (hanh chinh)) quan nhung cong dan ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((hanh trinh) OR (hanh chinh)) quan nhung cong dan ((toan cao) or (toan tap))*.