Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
van cong » van dong, van phong, phan cong
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan

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) or (chieu sang)) - hanh tang luan van cong ((van than) OR (van tuan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - hanh tang luan van cong ((van than) OR (van tuan)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - hanh tang luan van cong ((van than) OR (van tuan)) cap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - hanh tang luan van cong ((van than) OR (van tuan)) cap*.