convert sqlite ANSI to UTF-8

[Gandalf]

I used sqliteadmin to manage my sqlite database and I copy past
queries translated from mysql phpmyadmin output it worked (little
slowly but worked...), the only problem now is that sqliteadmin stored
my hebrew char as ANSI instead of UTF-8 and now I don't know how to
search data from this table.

How can I convert my database string from ANSI to UTF-8

Thanks!