Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, anh trinh
hien manh » hien hanh, hieu manh, hien nhanh
tien manh » tien anh, tien thanh, tieng anh
canh tinh » hanh tinh, manh tinh, canh tranh
lang nong » hang nong, lang dong, lang song
nong san » cong san, dong san, nong dan
san chan » san chang, dan chan, san chay
va lang » va nang, hoa lang
chan tu » phan tu, han tu, chon 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 manh) OR (tien manh)) - ((canh trinh) or (canh tinh)) va lang nong san chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (tien manh)) - ((canh trinh) OR (canh tinh)) va lang nong san chan tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (tien manh)) - ((canh trinh) or (canh tinh)) va lang nong san chan tu*".