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 phan » doan phan, dan chan, van phan
phan van » pham van, thanh van, tran 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 phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tach) OR (chieu sach)) - hanh trinh luan van cong dan phan van*".