Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh thang » nhanh thang, thanh thang, hanh trang
thong cong » trong cong, tong cong, thong thong
thanh phan » thanh pho, thanh san, thanh toan
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
thang va » hang va, trang va, thong va
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh

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 thang va thong cong tan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu van) OR (chieu sach)) - hanh thang va thong cong tan thanh phan*.