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
doi hieu » doi chieu, doc hieu, doi hien
cong dan » cong san, cong tan, huong dan
khan cap » khan ap, khoan cam, phan cac
than cap » thanh lap, thanh cac, than cua

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) or (cua cong)) cong dan ((khan cap) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - canh manh ((cua nhung) OR (cua cong)) cong dan ((khan cap) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - canh manh ((cua nhung) or (cua cong)) cong dan ((khan cap) or (than cap))*.