Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
thong cua » thong quan, thong tu, huong cua
cua nhung » va nhung
danh toan » manh toan, anh toan, dang toan
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu lang)) - thanh thong cua nhung cong ((danh toan) OR (dan toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - thanh thong cua nhung cong ((danh toan) OR (dan toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (hieu lang)) - thanh thong cua nhung cong ((danh toan) OR (dan toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu lang)) - thanh thong cua nhung cong ((danh toan) OR (dan toan)) cao*.