Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh trinh » hanh trinh, manh tinh, anh trinh
trinh thi » trinh tai, dinh thi, trinh tu
thi thong » thi thuong, thi hong, thi khong
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, dan than, manh toan

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 - manh trinh thi thong thong ((tinh toan) or (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - manh trinh thi thong thong ((tinh toan) OR (dan toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - manh trinh thi thong thong ((tinh toan) or (dan toan)) cau*.