Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tuan » thanh toan, thanh xuan, thanh thanh
hieu xanh » hieu manh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
dung song » dung cong, dung dong, dong song
vung song » vung dong, xuong song, nang song
tang dan » tang van, tung dan, tang luan
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: doc ((hieu xanh) OR (chieu xanh)) - hanh tang dan ((dung song) or (vung song)) thanh tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - hanh tang dan ((dung song) OR (vung song)) thanh tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - hanh tang dan ((dung song) or (vung song)) thanh tuan tap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - hanh tang dan ((dung song) or (vung song)) thanh tuan tap*.