Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh mang » nhanh mang, hanh trang, nhanh lang
anh tang » anh bang, anh dang, anh nang
luan ban » luan van, luan san, luan han
ban cong » bang cong, van cong, phan cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - ((anh tang) or (hanh mang)) luan ban cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - ((anh tang) OR (hanh mang)) luan ban cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - ((anh tang) or (hanh mang)) luan ban cong dan toan cao*.