Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hien xanh » hien hanh, chieu xanh, hien khanh
tranh cua » doanh cua, manh cua
dang nong » dang cong, hang nong, tang nong
tranh ban » trinh ban, tranh hang, tranh luan
cua dang » cua cong, cua ban
nong tan » cong tan, nong dan, nong san
tran ban » tran van, toan ban, tran bai

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) OR (hien nhanh)) - canh tranh cua dang nong tan ((tran ban) or (tranh ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - canh tranh cua dang nong tan ((tran ban) OR (tranh ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien nhanh)) - canh tranh cua dang nong tan ((tran ban) or (tranh ban))*".