Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien sach » dien sach, thien hach, chieu sach
kien sach » dien sach, vien bach, kien mac
hanh luan » khanh luan, hang luan, hanh luat
van nhung » van nhuong, va nhung, van hung
cong van » cong vang, cong san, song van
tai cao » thai cao, tao cao, tai cac
tai sao » tai san

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) or (kien sach)) - hanh luan van nhung cong van ((tai cao) or (tai sao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (kien sach)) - hanh luan van nhung cong van ((tai cao) OR (tai sao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (kien sach)) - hanh luan van nhung cong van ((tai cao) or (tai sao))*.