Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh trinh » hanh chinh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
va thong » va thuong, va phuong, he thong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van 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 (doi chieu)) sach - ((hanh trinh) or (canh tranh)) va thong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) sach - ((hanh trinh) OR (canh tranh)) va thong cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) sach - ((hanh trinh) or (canh tranh)) va thong cong san toan ban*.