Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, dien thanh
tien thanh » tien thinh, tran thanh, den thanh
thang nong » thang long, hang nong, tang nong
tranh va » tranh van, trang va, trinh va
va thang » van thang, va thanh, va thong
nong dan » cong dan, nong san, nguong dan
khan cap » khan ap, khoan cam, phan cac
than cap » thanh lap, thanh cac, than cua

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 nhanh) or (tien thanh)) - canh tranh va thang nong dan ((khan cap) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (tien thanh)) - canh tranh va thang nong dan ((khan cap) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (tien thanh)) - canh tranh va thang nong dan ((khan cap) or (than cap))*.