This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
What have you tried? What does "wrong result" mean?
There are various lexicographic rules, and their ordering of these special characters might differ. Oracle has a session parameter called NLS_SORT which determines the lexicographic rules used for sorting and affects all queries in the session. Then there is a NLSSORT function that can be used to override the session-wide setting for a single query.