Perhaps you should try some spelling variations:
luan chung » luan chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
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 xanh - hanh tang luan chung ((cong dan) OR (cong san)) chan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tang luan chung ((cong dan) OR (cong san)) chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tang luan chung ((cong dan) OR (cong san)) chan cau*.