Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh bang » anh bang, hanh mang, lanh bang
bang luan » tang luan, hang luan, dung luan
dan thanh » dang thanh, danh thanh, van thanh
ban thanh » ban hanh, ban hang
luan ban » luan van, luan san, luan han
ban song » bang song, bean song, ban cong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) OR (chieu sang)) - hanh bang luan ban song ((dan thanh) or (ban thanh)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - hanh bang luan ban song ((dan thanh) OR (ban thanh)) cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sang)) - hanh bang luan ban song ((dan thanh) or (ban thanh)) cac".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sang)) - hanh bang luan ban song ((dan thanh) or (ban thanh)) cac*.