Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
hang dong » hang nong, hanh dong, lang dong
hang cong » dang cong, hang nong, bang cong
tin toan » tinh toan, nin toan, trinh toan
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 ((hieu lang) or (chieu sach)) - canh tranh cua ((hang dong) or (hang cong)) tin toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sach)) - canh tranh cua ((hang dong) OR (hang cong)) tin toan ban.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sach)) - canh tranh cua ((hang dong) or (hang cong)) tin toan ban*.