Maybe you can try to escape the synonyms so it's no tokized by whitespace..
Private\ schools,NGO\ Schools,Unaided\ schools -- View this message in context: http://lucene.472066.n3.nabble.com/Query-on-Synonyms-feature-in-Solr-tp3058197p3062392.html Sent from the Solr - User mailing list archive at Nabble.com.