Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
thoai cac » tai cac, thong cac, hoa cac
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
cong ban » cong bang, cong san, cong tan
tho cac » cho cac, tho ca, thong cac

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 va thong cong ban ((thoai cac) OR (tho cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) sach - hanh trinh va thong cong ban ((thoai cac) OR (tho cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (doi chieu)) sach - hanh trinh va thong cong ban ((thoai cac) OR (tho cac))".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) sach - hanh trinh va thong cong ban ((thoai cac) OR (tho cac))*.