Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tuong cong » truong cong, trong cong, tong cong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh luan » khanh luan, hang luan, hanh luat
van tuong » van truong, van thuong, van duong
cong van » cong vang, cong san, song van
van dan » van ban, ban dan, van dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien ((hieu lang) OR (chieu sach)) - hanh luan van tuong cong van dan ca~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thien ((hieu lang) OR (chieu sach)) - hanh luan van tuong cong van dan ca".
• Adding a wildcard symbol may retrieve word variants: thien ((hieu lang) OR (chieu sach)) - hanh luan van tuong cong van dan ca*.