Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tran » thanh trang, thanh toan, thanh tra
dong song » dong son, song song, dong cong
tran van » luan van
song van » hoang van, trong van, duong van
tang ban » tang bang, tiang ban, tang van
tan ban » toan ban, van ban, can ban

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) or (chieu sang)) - thanh tran van dong song van ((tan ban) or (tang ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - thanh tran van dong song van ((tan ban) OR (tang ban)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - thanh tran van dong song van ((tan ban) or (tang ban))*.