Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua trong » cua truong, cua trung, qua trong
tan toan » van toan, dan toan, tam toan
tap toan » tap doan, tap quan, bai toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trinh cua trong cong ((((tan toan) OR (tap toan))) OR (tan tran)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trinh cua trong cong ((((tan toan) OR (tap toan))) or (tan tran)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh cua trong cong ((((tan toan) OR (tap toan))) or (tan tran)) cau*.