Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
ban thanh » ban hanh, ban hang
hoc hieu » hoc thieu, hoc hien, doc hieu
van than » van thanh, van thang, van tuan
van hoan » van hoang, van hoa, van toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh chinh cua nhung cong ((ban thanh) or (((van than) or (van hoan)))) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh chinh cua nhung cong ((ban thanh) OR (((van than) OR (van hoan)))) ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh chinh cua nhung cong ((ban thanh) or (((van than) or (van hoan)))) ban*.