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 dau » hang va, hang tai
ho hieu » ho chieu, hoi hieu, nho hieu

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

• 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 dau))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tranh cua bang cong tac ((phan tu) OR (hang dau))*.