Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trang » thanh trung, hanh trinh, minh trang
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trong dan » trong dang, trong tan, trong ban
trong san » trong cac, cong san, dong san
cua dung » cua dang, cua dong, qua dung
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - ((hanh trang) or (canh tranh)) cua dung ((trong dan) OR (trong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((hanh trang) OR (canh tranh)) cua dung ((trong dan) OR (trong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - ((hanh trang) or (canh tranh)) cua dung ((trong dan) OR (trong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - ((hanh trang) or (canh tranh)) cua dung ((trong dan) OR (trong san)) toan ban*.