Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
thong minh » thong tin, hoang minh
minh toan » tinh toan, manh toan, minh tuan
va thong » va thuong, va phuong, he thong
toan cao » toan ban, toan tap
tinh » trinh, dinh, kinh

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 ((trieu tinh) OR (chieu sach)) - ((thanh trung) OR (thanh tung)) va thong thong minh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((trieu tinh) or (chieu sach)) - ((thanh trung) OR (thanh tung)) va thong thong minh toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((trieu tinh) or (chieu sach)) - ((thanh trung) OR (thanh tung)) va thong thong minh toan cao*.