Perhaps you should try some spelling variations:
khong cong » khong cang, chong cong, khong con
hanh doanh » hang doanh, chinh doanh, doanh doanh
thong cong » trong cong, tong cong, phong chong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
van han » van hanh, van phan, van nhan
han tap » han tai, toan tap, nhan tai

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: theo hieu lang - hanh doanh cua ((((khong cong) OR (thong cong))) OR (thong thong)) van han tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh doanh cua ((((khong cong) OR (thong cong))) or (thong thong)) van han tap~".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh doanh cua ((((khong cong) OR (thong cong))) or (thong thong)) van han tap*.