Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung dang » nhung lang, nhung dung, nhung bang
dang thanh » dong thanh, dang hanh, hoang thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
tung va » trung va, tuong va, dung va

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 ((dieu hanh) OR (chieu sach)) - thanh tung va nhung dang thanh ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((dieu hanh) or (chieu sach)) - thanh tung va nhung dang thanh ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ho ((dieu hanh) or (chieu sach)) - thanh tung va nhung dang thanh ((toan cau) OR (toan tap))*.