Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hien hanh » dieu hanh
canh manh » lanh manh, canh tranh, cach mang
nguon van » nguon von, nguoi van, nguyen van
cua tang » cua dang, cua hang, cua lang
van tuan » van quan, van ban, anh tuan
tuan tap » toan tap, tuan tai, tuyen tap
ca tang » cao tang, ha tang, gia tang

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 ((cua tang) OR (ca 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 ((cua tang) OR (ca 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 ((cua tang) OR (ca tang)) nguon van tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (chieu xanh)) - canh manh ((cua tang) OR (ca tang)) nguon van tuan tap*.