Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » tong cong, thong thong, phong chong
hanh tang » hanh trang, anh tang, hanh mang
ho chieu » theo chieu, hoc thieu, doi chieu
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
tang he » tang le, tang ha, bang he

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