Perhaps you should try some spelling variations:
khong cong » thong cong, chong cong, khong con
hanh doanh » hang doanh, chinh doanh, doanh doanh
khong cang » thong cong, hong bang, khong dung
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
nvan tai » nhan tai, nan tai, nganh tai
van tai » von tai, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - hanh doanh cua ((khong cong) OR (khong cang)) san ((van tai) or (nvan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh doanh cua ((khong cong) OR (khong cang)) san ((van tai) OR (nvan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh doanh cua ((khong cong) OR (khong cang)) san ((van tai) or (nvan tai))".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh doanh cua ((khong cong) OR (khong cang)) san ((van tai) or (nvan tai))*.