Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
cua bang » chua bang, cua ban, cua dang
cong tac » cong ty
hang tai » dung tai
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - hanh tranh cua bang cong tac ((phan tu) OR (((hang tai) OR (hang va))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh tranh cua bang cong tac ((phan tu) or (((hang tai) OR (hang va))))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tranh cua bang cong tac ((phan tu) or (((hang tai) OR (hang va))))*.