Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
dong huong » dong thuong, dong duong, cong huong
hanh tram » hanh tam, hanh trang, thanh tran
ho chieu » hoc thieu, doi chieu, mot chieu
tram van » tran van, tam van, trang van
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

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