Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
csinh cua » chinh cua, tinh cua, trinh cua
ho chieu » theo chieu, hoc thieu, doi chieu
sinh cua » manh cua, dinh cuu, sinh va
tam toan » tam than, pham toan, tam thanh
tap toan » tap doan, tap quan, bai 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 - hanh ((csinh cua) or (sinh cua)) thong cong ((tam toan) OR (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((csinh cua) OR (sinh cua)) thong cong ((tam toan) OR (tap toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((csinh cua) or (sinh cua)) thong cong ((tam toan) OR (tap toan)) ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((csinh cua) or (sinh cua)) thong cong ((tam toan) OR (tap toan)) ban*.