Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
hanh trinh » canh tranh, hanh chinh
xuong song » xuong san
hoc thieu » toc thieu
vung song » vung dong, nang song, bang song
van quan » van ban
quan cau » quang cao, toan cau, quan ha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (hoc hien)) sach - hanh trinh luan ((vung song) OR (xuong song)) van quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) sach - hanh trinh luan ((vung song) OR (xuong song)) van quan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) sach - hanh trinh luan ((vung song) OR (xuong song)) van quan cau*".