Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tranh » hanh trinh, hanh trang, lanh tranh
cua nhung » va nhung
ho chiet » ho chieu, ho thiet, hoc thiet
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
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) OR (cong tan)) 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) OR (cong tan)) doan dau~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((hanh tranh) or (canh tranh)) cua nhung ((cong tap) OR (cong tan)) doan dau*.