Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
canh thanh » canh tranh, danh thanh, anh thanh
thanh phan » thanh pho, thanh san, thanh toan
tang nguon » tang nguyen, dung nguon, bang ngon
phan tang » phap tang, phan dang, phan cang
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu xanh)) - canh thanh phan tang nguon ((van toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu xanh)) - canh thanh phan tang nguon ((van toan) OR (dan than)) tap.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu xanh)) - canh thanh phan tang nguon ((van toan) or (dan than)) tap*.