Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
luan chung » luan chinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan cau » phan cau, can cau, chinh cau

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 - hanh tang luan chung ((cong dan) or (cong san)) chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh tang luan chung ((cong dan) OR (cong san)) chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh tang luan chung ((cong dan) or (cong san)) chan cau*.