Perhaps you should try some spelling variations:
tang nguon » tang nguyen, dung nguon, bang ngon
chieu xanh » chieu sach, chieu sang, chieu tinh
hien hanh » dieu hanh
canh manh » lanh manh, cach mang, van manh
nguon van » nguon von, nguoi van, nguyen van
cua tang » cua dang, cua hang, ca tang
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 hanh) or (chieu xanh)) - ((canh manh) OR (canh tranh)) cua tang nguon van tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (chieu xanh)) - ((canh manh) OR (canh tranh)) cua tang nguon van tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (chieu xanh)) - ((canh manh) OR (canh tranh)) cua tang nguon van tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (chieu xanh)) - ((canh manh) OR (canh tranh)) cua tang nguon van tuan tap*.