Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
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 ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((nhieu tang) or (chieu sach)) - hanh tranh va thong ((cong manh) OR (duong manh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((nhieu tang) OR (chieu sach)) - hanh tranh va thong ((cong manh) OR (duong manh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((nhieu tang) or (chieu sach)) - hanh tranh va thong ((cong manh) OR (duong manh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((nhieu tang) or (chieu sach)) - hanh tranh va thong ((cong manh) OR (duong manh)) toan ban*.