diff --git a/composer.json b/composer.json
index d78bec7..ca07f32 100644
--- a/composer.json
+++ b/composer.json
@@ -12,5 +12,8 @@
         "psr-4": {
             "Talmp\\Phputils\\": "src/"
         }
+    },
+    "require": {
+        "voku/portable-ascii": "^2.0"
     }
 }
diff --git a/composer.lock b/composer.lock
index ea99336..a28e477 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,83 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b397ea7d033393337c327b277a69ed5c",
-    "packages": [],
+    "content-hash": "593a89abdaffe1149e9528679c010bb2",
+    "packages": [
+        {
+            "name": "voku/portable-ascii",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/voku/portable-ascii.git",
+                "reference": "b56450eed252f6801410d810c8e1727224ae0743"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/voku/portable-ascii/zipball/b56450eed252f6801410d810c8e1727224ae0743",
+                "reference": "b56450eed252f6801410d810c8e1727224ae0743",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~6.0 || ~7.0 || ~9.0"
+            },
+            "suggest": {
+                "ext-intl": "Use Intl for transliterator_transliterate() support"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "voku\\": "src/voku/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Lars Moelleken",
+                    "homepage": "http://www.moelleken.org/"
+                }
+            ],
+            "description": "Portable ASCII library - performance optimized (ascii) string functions for php.",
+            "homepage": "https://github.com/voku/portable-ascii",
+            "keywords": [
+                "ascii",
+                "clean",
+                "php"
+            ],
+            "support": {
+                "issues": "https://github.com/voku/portable-ascii/issues",
+                "source": "https://github.com/voku/portable-ascii/tree/2.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://www.paypal.me/moelleken",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/voku",
+                    "type": "github"
+                },
+                {
+                    "url": "https://opencollective.com/portable-ascii",
+                    "type": "open_collective"
+                },
+                {
+                    "url": "https://www.patreon.com/voku",
+                    "type": "patreon"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/voku/portable-ascii",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-03-08T17:03:00+00:00"
+        }
+    ],
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
@@ -2978,5 +3053,5 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "2.2.0"
+    "plugin-api-version": "2.3.0"
 }
diff --git a/src/StrUtil.php b/src/StrUtil.php
index 2e03740..0e7ebb9 100644
--- a/src/StrUtil.php
+++ b/src/StrUtil.php
@@ -2,8 +2,64 @@
 
 namespace Talmp\Phputils;
 
+use voku\helper\ASCII;
+
 class StrUtil
 {
+    public static function toSearchablePhrases(
+        string $string,
+        string $separator = ' ',
+        int $limit = PHP_INT_MAX,
+        int $min_length = 1,
+    ): array {
+        $explode_arr = explode($separator, $string, $limit);
+
+        $result = [];
+
+        // in case input string is not ascii
+        // eg: léon
+        // and with min_length = 1
+        // we will split it into
+        // ['l', 'é', 'e', 'o', 'n', 'lé', 'le', 'éo', 'eo', 'on', 'léo', 'leo', 'éon', 'eon', 'léon', 'leon']
+
+        foreach ($explode_arr as $sub_string) {
+            $mb_str_split = mb_str_split($sub_string);
+
+            $sub_string_length = count($mb_str_split);
+            $pointer = 0;
+
+            while (true) {
+                if ($pointer > $sub_string_length - 1) {
+                    break;
+                }
+                
+                $length = 1;
+
+                while ($pointer + $length < $sub_string_length + 1) {
+                    $result[implode('', array_slice($mb_str_split, $pointer, $length))] = true;
+                    $result[static::ascii(implode('', array_slice($mb_str_split, $pointer, $length)))] = true;
+                    $length += 1;
+                }
+
+                $pointer += 1;
+            }
+        }
+
+        return array_keys($result);
+    }
+
+    /**
+     * Transliterate a UTF-8 value to ASCII.
+     *
+     * @param  string  $value
+     * @param  string  $language
+     * @return string
+     */
+    public static function ascii(string $value, string $language = 'en')
+    {
+        return ASCII::to_ascii($value, $language);
+    }
+
     public static function replaceOnceIndex(
         array $searches,
         array $indexes,
diff --git a/tests/StrUtilTest.php b/tests/StrUtilTest.php
index f3b7395..55694b7 100644
--- a/tests/StrUtilTest.php
+++ b/tests/StrUtilTest.php
@@ -5,6 +5,13 @@
 
 class StrUtilTest extends TestCase
 {
+    public function test_to_searchable_phrases()
+    {
+        $this->assertEquals(16, count(StrUtil::toSearchablePhrases('léon')));
+
+        $this->assertEquals(32, count(StrUtil::toSearchablePhrases('amélie')));
+    }
+
     public function test_replace_once()
     {
         // case 0