Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
tran van » luan van
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) OR (ho chieu)) sach - hanh tran van dung cong tan than tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) sach - hanh tran van dung cong tan than tap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) sach - hanh tran van dung cong tan than tap*.