Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
tranh xuan » tran xuan, tranh luan, thanh xuan
xuan thang » xuan thanh, xuan trang, quan thanh
ho chieu » hoc thieu, doi chieu, mot chieu
long van » luong van, song van, lang van
cong dan » cong san, cong tan, huong dan
toan tap » toan ban

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