Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (hieu lang)) - canh tranh cua nhung cong ((dan than) OR (manh toan)) tap~.
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) or (hieu lang)) - canh tranh cua nhung cong ((dan than) or (manh toan)) tap*.