Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
cong thuat » trong thuat, vuong thuat, cong thuc
nhung dung » phuong dung, ung dung, trung dung
thong dung » thong cong, thong thuong
minh toan » tinh toan, manh toan, minh tuan
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: doi ((chieu sach) or (chieu sang)) - thanh cong thuat ((nhung dung) OR (thong dung)) minh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - thanh cong thuat ((nhung dung) OR (thong dung)) minh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu sang)) - thanh cong thuat ((nhung dung) OR (thong dung)) minh toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - thanh cong thuat ((nhung dung) OR (thong dung)) minh toan ban*.