Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hanh bang » anh bang, hanh mang, lanh bang
hach toan » thanh toan, manh toan
ho chieu » theo chieu, hoc thieu, doi chieu
tac toan » tap toan, tam toan, tich toan
bang he » bang khi

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 bang he thong cong ((tac toan) OR (hach toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh bang he thong cong ((tac toan) OR (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh bang he thong cong ((tac toan) OR (hach toan)) cau*.