Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
duong manh » duong van
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
vuong anh » phuong anh, cuong danh, duong xanh
luan han » luan hoan, luan phan, luan van

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 sach)) - hanh trinh cua nhung ((vuong anh) OR (duong manh)) luan han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - hanh trinh cua nhung ((vuong anh) OR (duong manh)) luan han.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sach)) - hanh trinh cua nhung ((vuong anh) OR (duong manh)) luan han".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - hanh trinh cua nhung ((vuong anh) OR (duong manh)) luan han*.