Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tran » hanh trang, thanh tran, hanh tram
dang cong » dung cong
hanh phan » thanh phan, anh phan, hanh han
hieu van » hieu va, thien van, lieu va
tran van » luan van
van dang » van dong, van dung, van nang
cong ban » cong bang, cong san, cong tan
ban hanh » ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu van) or (chieu sach)) - hanh tran van dang cong ban hanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu van) OR (chieu sach)) - hanh tran van dang cong ban hanh phan*.