Perhaps you should try some spelling variations:
chieu tach » chiet tach, chiu trach, chieu tinh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
van phong » van dong, hai phong
phong dan » phong van, thong dan, phong ban
dan nhan » danh nhan, dan chan, van nhan
nhan dan » phan dau, gian dan, nhan tai

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 tach) or (chieu sach)) - hanh trinh luan van phong dan nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tach) OR (chieu sach)) - hanh trinh luan van phong dan nhan dan*.