Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thien hieu » thien nhien, thien chien, thien hue
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dinh » thanh dinh, hinh dinh, hanh tinh
cua nhung » va nhung
dinh cua » dinh cuu, sinh cua, dinh cu
dan toan » van toan, dan than, manh toan
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien hieu lang - hanh dinh cua nhung cong ((dan toan) or (van than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien hieu lang - hanh dinh cua nhung cong ((dan toan) OR (van than)) ban*.