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 cong » van dong, van phong, phan cong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan van » chuan van, phan van, nhan 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 tach) or (chieu sach)) - hanh trinh luan van cong dan chan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tach) OR (chieu sach)) - hanh trinh luan van cong dan chan van*.