Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap
luan » quan, lan

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 ((tran van) or (luan van)) ((nhung cong) or (dung cong)) tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((tran van) OR (luan van)) ((nhung cong) OR (dung cong)) tan than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tran van) or (luan van)) ((nhung cong) or (dung cong)) tan than cau*.