Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong ngang » cong nhan, cong quang, cong lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong vang » cong lang, cong quang, cong san
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 ((hieu manh) or (chieu sach)) - canh tranh cua nhung ((cong vang) OR (cong ngang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - canh tranh cua nhung ((cong vang) OR (cong ngang)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - canh tranh cua nhung ((cong vang) OR (cong ngang)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - canh tranh cua nhung ((cong vang) OR (cong ngang)) toan cao*.