[Koha] Problems with search in Armenian language

Dear friends, we have recently installed koha 3.8.6. In the previous version we had problems with indexing Armenian language records. You have kindly suggested us to follow the instructions under this link *http://lists.katipo.co.nz/public/koha/2011-January/027171.html* and everything worked well. Unfortunately, for the latest version this instruction does not work. We have made all necessary adjustment but the search engine still does not work properly. When searching for a record it simply retrievs all existing ones and only highlits the queired keyword. Any suggestions?