Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trung quan » truong quan, trong quan, trung tuan
quan trong » gian trong
ban phan » ban phap, ban than, ban nhan
van phan » van phong, van thanh, luan phan

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 trung quan trong cong ((ban phan) or (van phan)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - thanh trung quan trong cong ((ban phan) OR (van phan)) cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chieu sang)) - thanh trung quan trong cong ((ban phan) or (van phan)) cac".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chieu sang)) - thanh trung quan trong cong ((ban phan) or (van phan)) cac*.