Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh luan » trinh luat, trinh quan, trinh toan
chung cong » nhung cong, phung cong, chung thong
chong cong » cong cong, thong cong, cuong cong
trinh han » trinh quan
tang luan » dung luan
luan phan » luan van, luan hoan
ho chieu » theo chieu, hoc thieu, mot chieu

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