CraftCMS: Search entries by title in CMS
It does search for the title by default.

I'm assuming you're on MySQL for the database. The searchindex table uses the MyISAM storage engine by default and example happens to be of the default MySQL MyISAM stopwords: https://dev.mysql.com/doc/refman/8.0/en/fulltext-stopwords.html (see "Stopwords for MyISAM Search Indexes"), which it will skip.