Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
cong tac » cong ty
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) or (hieu lang)) - hanh trang cua nhung ((huong dan) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hieu lang)) - hanh trang cua nhung ((huong dan) OR (cong tac)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hieu lang)) - hanh trang cua nhung ((huong dan) or (cong tac)) toan ban*.