Perhaps you should try some spelling variations:
hien khanh » hien hanh, hien nhanh, dien khanh
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, khien canh
tranh cua » doanh cua, manh cua
bang ngon » tang nguon, danh ngon, dang ngoc
cua bang » chua bang, cua ban, cua dang
ngon van » ngo van, ngan van, ngon dan
van tuan » van quan, van ban, anh tuan
tuan tap » toan tap, tuan tai, tuyen tap

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 khanh))) or (chieu xanh)) - canh tranh cua bang ngon van tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hien xanh) OR (hien khanh))) OR (chieu xanh)) - canh tranh cua bang ngon van tuan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hien xanh) OR (hien khanh))) or (chieu xanh)) - canh tranh cua bang ngon van tuan tap*".