Perhaps you should try some spelling variations:
danh trung » dang trung, dinh trung, manh trung
hanh trang » thanh trung, canh tranh, hanh trinh
hien xanh » hien hanh, hien nhanh, chieu xanh
cua nhung » va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cao » toan cao, thai cao, than cap

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 - ((danh trung) or (hanh trang)) cua nhung ((cong dan) OR (cong san)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((danh trung) OR (hanh trang)) cua nhung ((cong dan) OR (cong san)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((danh trung) or (hanh trang)) cua nhung ((cong dan) OR (cong san)) than cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((danh trung) or (hanh trang)) cua nhung ((cong dan) OR (cong san)) than cao*.