Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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