Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tranh » hanh trinh, hanh trang, lanh tranh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
ho chiet » ho chieu, ho thiet, hoc thiet
cong tap » cuong tap, cong tac, cong tan
doan cau » toan cau, doan cap, doanh chau
doan dau » doan dieu, phan dau, doan va

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 chiet tach - ((hanh tranh) OR (canh tranh)) cua nhung cong tap ((doan cau) OR (doan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((hanh tranh) or (canh tranh)) cua nhung cong tap ((doan cau) OR (doan dau))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((hanh tranh) or (canh tranh)) cua nhung cong tap ((doan cau) OR (doan dau))*.