Perhaps you should try some spelling variations:
ncanh tinh » nhanh tinh, thanh tinh, hanh tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
canh tinh » hanh tinh, manh tinh, canh tranh
cong nong » cong dong, cong cong, cong trong
nong danh » nong dan, cong danh, dong danh
thanh van » thanh toan, thanh phan, thanh nhan

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