Perhaps you should try some spelling variations:
thang nong » thang long, hang nong, tang nong
hien hanh » dieu hanh
canh tinh » hanh tinh, manh tinh, canh tranh
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
tinh va » tich va, trinh van, trinh vat

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