Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hanh doanh » hang doanh, chinh doanh, kinh doanh
khong cong » thong cong, khong cang, chong cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cua khong » hua khong, cua phuong, cua thuong
cong san » cong tac
hang tai » hang va, dung tai
han tai » nhan tai, van tai, toan tai

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