Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu
toan cau » toan cao, toan ban, toan tap
luan » quan, lan

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 - thanh ((tran van) OR (luan van)) dung cong tan ((phan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((tran van) OR (luan van)) dung cong tan ((phan cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((tran van) OR (luan van)) dung cong tan ((phan cau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((tran van) OR (luan van)) dung cong tan ((phan cau) or (toan cau))*.