Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hua khong » hoa khong, cua khong, hoac khong
sang toan » sang than, quang toan, sang tao
dang toan » dang tran, dan toan, dung toan
ho chieu » theo chieu, hoc thieu, doi chieu

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 ((cua cong) or (hua khong)) nang ((sang toan) or (dang toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh ((cua cong) OR (hua khong)) nang ((sang toan) OR (dang toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh ((cua cong) or (hua khong)) nang ((sang toan) or (dang toan)) cau*.