How to force Drupal search.module find "111-222" page by searching "111 222"? How to force Drupal search.module find "111-222" page by searching request "111 222" ?
For instance I have page example.com/111-222
about something, named 111-222
How to force Drupal to think that minus "-" and space is the same?

P.S. Famous search.module code modifications for partial search 
( $query2 = substr(str_repeat("i.word LIKE '%%%s%%' OR ", count($arguments2)), 0, -4);
etc) is already applied.

thank you.
Looking at the API for search, it would seem that hook_search_preprocess will allow you to alter the way keywords are extracted, something like this:

function mymodule_search_preprocess($text) {
  return preg_replace('/(\d+)-(\d+)/', '$1 $2', $text);
}


I haven't tested this code, it's purely meant as a sample. It assumes your "words" are all digits as per the question.