Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh hang » thanh hoang, thanh thang, tranh hang
trong manh » trong minh, trong anh, trong canh
trong mach » trong cac, trong minh, trong anh
toan cao » toan ban, toan tap
va dung » van dung, va duong, vat dung

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 (chieu tinh)) - thanh hang va dung ((trong manh) OR (trong mach)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu tinh)) - thanh hang va dung ((trong manh) OR (trong mach)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu tinh)) - thanh hang va dung ((trong manh) OR (trong mach)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu tinh)) - thanh hang va dung ((trong manh) OR (trong mach)) toan cao*.