Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
doi hieu » doi chieu, doc hieu, doi hien
mang cua » manh cua, dung cua, ban cua
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan lap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh mang cua nhung cong dan ((phan cau) OR (phan tu))~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh mang cua nhung cong dan ((phan cau) or (phan tu))*.