Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
hanh luan » khanh luan, hang luan, hanh luat
hang cong » dang cong, hang nong, bang cong
van hang » van khang, van hoang, van thang
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((nhieu tang) OR (chieu sach)) - hanh luan van hang cong bai toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) OR (chieu sach)) - hanh luan van hang cong bai toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) OR (chieu sach)) - hanh luan van hang cong bai toan cao*.