[KOHA] Searching catalog record for Arabic, Chinese character

Greetings, I am currently playing around with KOHA v2.2.6. I tried to insert a record in catalog using arabic title as well as inserting a new member which name is using arabic. when i try to search for patron using the arabic name it successfully found the patron. However when i try to search a catalog record using arabic title (where i type arabic in the searc field) it cannot find the record. so i need to search using isbn number or other non arabic data in the record to get the record. Displaying of arabic is fine. Just i cant search. Is there any trick for this? Cause for patron searching is working but not for catalog record. Thanks Regards, Kow Ming Foong