Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
van cong » van phong, phan cong, van duong
van luan » van quan, van tuan, von luan
luan ban » luan van, luan san, luan han

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (chieu sang)) - hanh trinh luan ((van cong) OR (van dong)) van luan ban~.
• Adding a wildcard symbol may retrieve word variants: toc ((thieu xanh) or (chieu sang)) - hanh trinh luan ((van cong) or (van dong)) van luan ban*.