Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
nhung cau » chung cu, nhung bai, nhu cau
hoc hieu » hoc thieu, hoc hien, doc hieu
cong cua » cong cu, dong cua, huong cua
cua nong » cua cong, cuu nong, cua dong
cong ban » cong bang, cong san, cong dan
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty

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 - thanh cong cua nong ((cong ban) or (((cong tan) OR (cong tac)))) nhung cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - thanh cong cua nong ((cong ban) OR (((cong tan) OR (cong tac)))) nhung cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - thanh cong cua nong ((cong ban) or (((cong tan) OR (cong tac)))) nhung cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - thanh cong cua nong ((cong ban) or (((cong tan) OR (cong tac)))) nhung cau*.