Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tran » hanh trang, thanh tran, hanh tram
ho chieu » hoc thieu, doi chieu, mot chieu
tran van » luan van
van dang » van dong, van dung, van nang
cong tac » cong ty
than ban » thanh ban, toan ban, than man

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