Perhaps you should try some spelling variations:
trung phuong » truong phuong, rung phuong, thuong phuong
theo chieu » theo tieu, ho chieu, theo chu
hanh tranh » canh tranh, hanh trinh, hanh trang
phuong dan » phuong danh, phuong doan, huong dan
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung

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