Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhanh lang » nhanh quang, nhanh thang, nhanh dong
nhung cong » thong cong, hang cong, nhung don
nhan dang » nhan dan, phan dang, tran dang
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan 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 chieu sach - ((nhanh lang) or (nhan dang)) van ((nhung cong) OR (dung cong)) manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((nhanh lang) OR (nhan dang)) van ((nhung cong) OR (dung cong)) manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((nhanh lang) or (nhan dang)) van ((nhung cong) OR (dung cong)) manh toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((nhanh lang) or (nhan dang)) van ((nhung cong) OR (dung cong)) manh toan tap*.