Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
duong manh » duong van
cong manh » cong danh, cong thanh, hoang manh
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
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: ho ((chieu sach) or (chieu tinh)) - canh tranh va thong ((cong manh) OR (duong manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu tinh)) - canh tranh va thong ((cong manh) OR (duong manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu tinh)) - canh tranh va thong ((cong manh) OR (duong manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu tinh)) - canh tranh va thong ((cong manh) OR (duong manh)) toan cau*.