switching to bool with a 'must' match (AND) and a few 'should's (OR)

query/search.js

@@ -22,12 +22,28 @@ function generate( params ){
 
   // add search condition to distance query
   query.query.filtered.query = {
-    query_string : {
-      query: params.input,
-      fields: ['name.default'],
-      default_operator: 'OR'
+    'bool': {
+      'must': [{ 
+          'match': {
+            'name.default': params.input
+          }
+        }
+      ]   
     }
   };
+  
+  if (params.input_admin) {
+    var admin_fields = ['admin0', 'admin1', 'alpha3'];
+    query.query.filtered.query.bool.should = [];
+
+    admin_fields.forEach(function(admin_field) {
+      var match = {};
+      match[admin_field] = params.input_admin;
+      query.query.filtered.query.bool.should.push({
+         'match': match
+      });
+    });
+  }
 
   query.sort = query.sort.concat(sort);