Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
tranh va » tranh van, trang va, trinh va
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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