Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
cong danh » cuong danh, cong thanh, cong khanh
doi hieu » doi chieu, doc hieu, doi hien
manh cua » doanh cua, ban cua
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - canh manh cua nhung ((cong danh) or (cong dan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - canh manh cua nhung ((cong danh) OR (cong dan)) phan tu.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - canh manh cua nhung ((cong danh) or (cong dan)) phan tu*.