Perhaps you should try some spelling variations:
trong thanh » truong thanh, trung thanh, rong thanh
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
quan dung » quang dung, quan duong, qua dung
thanh van » thanh san, thanh toan, thanh phan
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu sang)) - ((anh tang) or (anh dang)) quan dung trong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - ((anh tang) OR (anh dang)) quan dung trong thanh van ban.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - ((anh tang) or (anh dang)) quan dung trong thanh van ban*.