Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
tang nguon » tang nguyen, dung nguon, bang ngon
hien xanh » hien hanh, hien nhanh, hien khanh
tranh cua » doanh cua, manh cua
nguon van » nguon von, nguoi van, nguyen van
cua tang » cua dang, cua hang, ca tang
tuan tap » toan tap, tuyen tap, toan tai
tuan tai » toan tai, quan tai, tan tai

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 (chieu xanh)) - canh tranh cua tang nguon van ((tuan tap) OR (tuan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - canh tranh cua tang nguon van ((tuan tap) OR (tuan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - canh tranh cua tang nguon van ((tuan tap) OR (tuan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - canh tranh cua tang nguon van ((tuan tap) OR (tuan tai))*.