Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
trang van » tran van, trong van, tang van
dung cong » dung trong
doan phan » doanh phan, toan phan, dan phan
trang va » tran van, hang va
phan cau » phan dau, phan cac, phan tu
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - canh ((trang va) or (trang van)) ((nhung cong) or (dung cong)) doan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh ((trang va) OR (trang van)) ((nhung cong) OR (dung cong)) doan phan cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh ((trang va) or (trang van)) ((nhung cong) or (dung cong)) doan phan cau*.