Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhanh mang » nhanh lang, hanh mang, nhanh quang
doi chieu » doc hieu, doi chi, ho chieu
luan han » luan hoan, luan phan, luan san
tong tap » tuong tac, trong tan, cong tac
doan cau » toan cau, doan dau, doanh chau
doan cap » doanh cao, dan ca, toan cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - nhanh mang ((luan han) OR (luan van)) tong tap ((doan cau) or (doan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - nhanh mang ((luan han) OR (luan van)) tong tap ((doan cau) OR (doan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - nhanh mang ((luan han) OR (luan van)) tong tap ((doan cau) or (doan cap))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh mang ((luan han) OR (luan van)) tong tap ((doan cau) or (doan cap))*.