Perhaps you should try some spelling variations:
hanh trinh » canh tranh
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
vai thong » va thong, vai trong, van thong
ban thoai » ban thai, ban thoi, van thoai
thoai cac » tai cac, thong cac, tho cac
cong ban » cong bang, cong san, cong tan

You may be able to get more results by adjusting your search query.

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