Perhaps you should try some spelling variations:
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
25 trieu » 30 trieu
luan han » luan hoan, luan phan, luan van
nong van » song van, nong san, tong van
nong dan » cong dan, nong san, nguong dan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: 25 trieu tinh - ((hanh tang) OR (hanh mang)) luan han ((nong van) OR (nong dan)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "25 trieu tinh - ((hanh tang) or (hanh mang)) luan han ((nong van) OR (nong dan)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: 25 trieu tinh - ((hanh tang) or (hanh mang)) luan han ((nong van) OR (nong dan)) toan cau*.