diff --git a/js/base.php b/js/base.php
index 1fb1102..5d49c86 100644
--- a/js/base.php
+++ b/js/base.php
@@ -131,6 +131,14 @@ function remove_accents(str) {
 	return str.normalize("NFD").replace(/[\u0300-\u036f]/g, "");
 }
 
+function insert_string(main_string, ins_string, pos) {
+	if (typeof(pos) == undefined)
+		pos = 0;
+	if (typeof(ins_string) == undefined)
+		ins_string = '';
+	return main_string.slice(0, pos) + ins_string + main_string.slice(pos);
+}
+
 function normalize_for_search(str) {
 	if (str.trim() === '') return '';
 	str = str.trim().replaceAll(/\s\s+/g, ' ');
@@ -140,7 +148,7 @@ function normalize_for_search(str) {
 		var word = words[i];
 		word = remove_accents(word);
 		word = word.toLowerCase();
-		word = word.replaceAll(/[^a-z0-9]+/g, '');
+		word = word.replaceAll(/[^a-z0-9]+/g, ' ');
 		if (word.trim() === '')
 			continue;
 		word = word.replaceAll('4','a');
diff --git a/views/instance.php b/views/instance.php
index fe871d2..8124bf8 100644
--- a/views/instance.php
+++ b/views/instance.php
@@ -75,10 +75,25 @@ window.view.instance = {
 					case 'has':
 					case 'includes':
 					case 'contains':
-						// TODO: implement contains "sr"
-						break;
 					case 'regex':
-						// TODO: implement regex "sr"
+						var t = remove_accents(html);
+						t = t.replace(/[^a-zA-Z0-9]/g, ' ');
+						t = t.toLowerCase();
+						content = content.replace(/\s+/g, ' ')
+							.trim().replaceAll(' ', '.');
+						content = content.replace(/\w/g,
+							function(m) { return m+'+?'});
+						var n = 0;
+						console.log(content);
+						t.replace(new RegExp(content), function(m) {
+							var st = t.indexOf(m, n);
+							var en = st + m.length;
+							const inj_st = '<span class="sr">';
+							const inj_en = '</span>';
+							html = insert_string(html, inj_st, st);
+							html = insert_string(html, inj_en, en + inj_st.length);
+							n = t.indexOf(m) + m.length;
+						});
 						break;
 				}
 			}