Highligh Search results

Hi WordPressers! I am trying to customize my serch.php which shows the search results of my website. The problem is, that when for example i’m looking for a specific word, the search results displayed the whole page (permalink page) where the that word is saved. Though, I want the search results to return just the specific post which include the search term word (highlighted) and not the full permalink. This is the search.php code:

[code moderated according to forum rules - please use the pastebin]