Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
tong song » tong cong, dong song, tong son
song song » song hong, song dong, xuong song
ho chieu » theo chieu, hoc thieu, doi chieu
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh trinh luat ((tong song) OR (song song)) van luan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh trinh luat ((tong song) OR (song song)) van luan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh luat ((tong song) OR (song song)) van luan ban*.