Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thanh tung » thanh cong
tung tuan » trung tuan, hung tuan, quang tuan
ho chieu » hoc thieu, doi chieu, mot chieu
tuan ban » tuan bang, toan ban, luan ban
ban song » bang song, bean song, ban cong
doan van » doan va, hoang van, luan van
dan van » dang van, dao van, tan van

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) or (theo chieu)) sach - thanh tung tuan ban song ((dan van) OR (doan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - thanh tung tuan ban song ((dan van) OR (doan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - thanh tung tuan ban song ((dan van) OR (doan van)) ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - thanh tung tuan ban song ((dan van) OR (doan van)) ban*.