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 tran » trung tuan, trung thanh, trung tam
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
tac toan » tap toan, tam toan, hach toan
toan ban » van 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 trung tran ((nhung cong) OR (thong cong)) tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - thanh trung tran ((nhung cong) OR (thong cong)) tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - thanh trung tran ((nhung cong) OR (thong cong)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - thanh trung tran ((nhung cong) OR (thong cong)) tac toan ban*.