Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
ban than » ban thanh, van thanh, ban hang
tang su » tang suc, trang su, dang su

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (nhieu tang)) - hanh tang su dung cong ((manh toan) or (ban than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (nhieu tang)) - hanh tang su dung cong ((manh toan) OR (ban than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (nhieu tang)) - hanh tang su dung cong ((manh toan) or (ban than)) ban*.