Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, nhung don
hanh dung » thanh dung, anh dung, hanh dong
hang cong » dang cong, hang nong, bang cong
dung cua » dung luan, dung cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu tinh)) - hanh dung cua ((nhung cong) OR (hang cong)) luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu tinh)) - hanh dung cua ((nhung cong) OR (hang cong)) luan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu tinh)) - hanh dung cua ((nhung cong) OR (hang cong)) luan van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu tinh)) - hanh dung cua ((nhung cong) OR (hang cong)) luan van ban*.