Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
dong thanh » truong thanh
thanh phan » thanh pho, thanh san, thanh toan
hieu cach » hieu cac, hieu ca, biet cach
dai duong » dai cuong, hai duong, dai luong
dai dung » dan dung, mai dung, dai dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((chieu sach) or (hieu cach)) - thanh trung ((dai dung) or (dai duong)) dong thanh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((chieu sach) OR (hieu cach)) - thanh trung ((dai dung) OR (dai duong)) dong thanh phan tu.
• Adding a wildcard symbol may retrieve word variants: toc ((chieu sach) or (hieu cach)) - thanh trung ((dai dung) or (dai duong)) dong thanh phan tu*.