Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
duong manh » duong van
cua nhung » va nhung
cong manh » cong danh, cong thanh, hoang manh
anh mang » hanh mang, anh bang, anh dang
mang cua » manh cua, dung cua, ban cua
toan cau » 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: theo ((chieu sach) or (trieu tinh)) - anh mang cua nhung ((cong manh) OR (duong manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (trieu tinh)) - anh mang cua nhung ((cong manh) OR (duong manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (trieu tinh)) - anh mang cua nhung ((cong manh) OR (duong manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (trieu tinh)) - anh mang cua nhung ((cong manh) OR (duong manh)) toan cau*.