Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh khoa » toan khoa
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
nhan cach » phan cac
ho chieu » theo chieu, hoc thieu, doi chieu
phan cau » phan dau, phan cac, phan tu
khoa va » khoan va, khoa ma, hoa va

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 - doanh khoa va ((nhung cong) or (thong cong)) tan ((phan cau) or (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - doanh khoa va ((nhung cong) OR (thong cong)) tan ((phan cau) OR (nhan cach)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - doanh khoa va ((nhung cong) or (thong cong)) tan ((phan cau) or (nhan cach))*.