Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
hanh tu » anh tu, danh tu

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 tranh cua nhung ((cong dan) OR (cong san)) hanh tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh tranh cua nhung ((cong dan) OR (cong san)) hanh tu".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh tranh cua nhung ((cong dan) OR (cong san)) hanh tu*.