Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
hieu lang » chieu sang, hieu quang, nhieu tang
thong cua » thong quan, thong tu, huong cua
dang cong » dung cong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
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 - thanh thong cua ((trong cong) or (dang cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh thong cua ((trong cong) OR (dang cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh thong cua ((trong cong) or (dang cong)) dan than cau*.