Search does not return all the pages


The XWiki search does not return all the pages that contain the word I searched for. For example, I have searched for the word “review”, it only returns 20 pages that contain that word. There are some more pages with the word “review” which I do not see in the search results. If you can suggest some help that would be greatly appreciated.
Many thanks

You could check your xwiki logs. Maybe there were errors indexing these pages. Also make sure that these pages are written in the language in which the search is done.