Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: theo ((chiet tach) or (hieu lang)) - ((hanh tang) or (hanh mang)) cua nhung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (hieu lang)) - ((hanh tang) OR (hanh mang)) cua nhung cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((chiet tach) or (hieu lang)) - ((hanh tang) or (hanh mang)) cua nhung cong van toan ban*.