Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
tranh cua » doanh cua, manh cua
duong van » duong va, luong va, dang van
ho chieu » theo chieu, hoc thieu, mot chieu
cua dong » chua dong, cua cong, cua dang
song van » hoang van, trong van, dang van
tuan cao » toan cao, juan cao, quang cao

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 (doi chieu)) sach - canh tranh cua dong ((song van) or (duong van)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - canh tranh cua dong ((song van) OR (duong van)) tuan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - canh tranh cua dong ((song van) or (duong van)) tuan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - canh tranh cua dong ((song van) or (duong van)) tuan cao*.