Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hieu quan » hieu qua, lieu quan, thien quan
chinh sua » chinh su, chinh cua, chinh luan
dung cong » dung trong
danh tuan » anh tuan, manh tuan, danh thanh
tuan cau » toan cau, quan cau, tuan cu

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) or (hieu quan)) - hanh chinh sua ((nhung cong) or (dung cong)) danh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quan)) - hanh chinh sua ((nhung cong) OR (dung cong)) danh tuan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (hieu quan)) - hanh chinh sua ((nhung cong) or (dung cong)) danh tuan cau*.