Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thanh tang » thanh thang, thanh trang, thanh tung
dung cong » dung trong
tang vat » tang van, dang vat, bang vat
vat dung » van dung, va dung, viet dung
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu
toan cao » toan ban, toan tap

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 tang vat dung cong tan ((phan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - thanh tang vat dung cong tan ((phan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - thanh tang vat dung cong tan ((phan cau) or (toan cao))*.