Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, trung cua, thang cua
dung cong » dung trong
hoi hieu » hoi phieu, hoi tieu, moi hieu
tang cua » mang cua, hang cua, tang luan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh ((trang cua) or (tang cua)) ((nhung cong) or (dung cong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh ((trang cua) OR (tang cua)) ((nhung cong) OR (dung cong)) dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh ((trang cua) or (tang cua)) ((nhung cong) or (dung cong)) dan than cao*.