Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh vi » trinh va, trinh ve, trinh viet
vi thong » va thong, li thong, vi hong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, van than, dang thanh
ban than » ban thanh, van thanh, ban hang

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