Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, mot chieu
tranh xua » tranh cua, tranh luan, thanh xuan
xua thang » xuan thang, xuan thanh, xuan trang
ho chieu » theo chieu, hoc thieu, mot chieu
long van » luong van, song van, lang van
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (ho chieu)) sach - hanh tranh xua thang ((long van) or (cong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - hanh tranh xua thang ((long van) OR (cong dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) sach - hanh tranh xua thang ((long van) or (cong dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) sach - hanh tranh xua thang ((long van) or (cong dan)) toan cau*.