Perhaps you should try some spelling variations:
hanh hang » thanh hang, hang hang, hanh han
luan nang » luan van, van nang
chao cau » chao chu, chao chao, cao cap
cau sach » cao sach, hau sach, rau sach
luan san » luan van, luan hoan, luan phan
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao cau sach - hanh hang ((luan nang) or (luan san)) cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao cau sach - hanh hang ((luan nang) OR (luan san)) cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: chao cau sach - hanh hang ((luan nang) or (luan san)) cong dan toan tap*.