Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
tuong dan » xuong dan, truong dai, nguong dan
ho chiet » ho chieu, ho thiet, hoc thiet
trinh va » trinh van, trinh vat, trinh ve
tung dan » dung dan, trung dai, dung dat
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) OR (huong dan)))) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh va nhung ((tuong dan) OR (((tung dan) OR (huong 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) OR (huong dan)))) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh va nhung ((tuong dan) or (((tung dan) OR (huong dan)))) toan tap*.