Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
dung huong » dung thuong, dung phuong, dong huong
trung va » truong va, trang va, trung ha
phan cau » phan dau, phan cac, phan tu
than cap » khan cap, thanh lap, thanh cac
va dung » van dung, va duong, vat dung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh trung va dung huong dan ((phan cau) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - thanh trung va dung huong dan ((phan cau) or (than cap))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - thanh trung va dung huong dan ((phan cau) or (than cap))*.