Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
tuong dan » huong dan, xuong dan, truong dai
ho chiet » ho chieu, ho thiet, hoc thiet
trinh va » trinh van, trinh vat, trinh ve
tung dan » dung dan, huong dan, trung dai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - hanh trinh va nhung ((tuong dan) OR (tung dan)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh trinh va nhung ((tuong dan) OR (tung dan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh va nhung ((tuong dan) OR (tung dan)) toan tap*.