Perhaps you should try some spelling variations:
thang nong » thang long, hang nong, tang nong
hien xanh » hien hanh, hien nhanh, chieu xanh
thang va » hang va, trang va, thanh va
thong va » thong cua, truong va, thong qua
nong dan » cong dan, nong san, nguong dan
toan cao » toan ban
toan tap » toan ban

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 - thanh ((thang va) or (thong va)) thang nong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((thang va) OR (thong va)) thang nong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((thang va) or (thong va)) thang nong dan ((toan cao) or (toan tap))*.