Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » thong cong, hang cong, nhung don
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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 (chiet tach)) - thanh trung cua ((nhung cong) OR (dung cong)) ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh trung cua ((nhung cong) OR (dung cong)) ban than cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chiet tach)) - thanh trung cua ((nhung cong) OR (dung cong)) ban than cau*".