Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trong manh » trong minh, trong anh, trong canh
trong mach » trong cac, trong minh, trong anh
chau tinh » cuu tinh, ha tinh, cua tinh
tranh cua » doanh cua, manh cua
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban, toan tap

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

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