Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
ltinh toan » trinh toan, tinh than, hinh toan
phan than » phan thanh, phan tan, khan than
ho chieu » theo chieu, hoc thieu, mot chieu
phan han » phan hoan, phan phan, phan van

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