Great question Wouter. Enclose your search string in quotes to limit the result set to only those posts containing exactly what you specify in the search box.
E.g., "Is there a way in the forums" wrapped in quotes returns only this post in the search results.
Thanks for the fast response, but the method you suggest is only usable if the sequence of words of my search string exactly matches the order of words in the posts. There isn't a way to e.g. only return the posts who contain *all* the words of ( 'Is',there','any','way','to','search','like','the','default','of','any','modern' ,'search','engine') but in any possible order?
Use the + operator in front of your search terms. This implies a required search term and enables you to order the terms in any sequence. For example, +web +dashboard returns all posts containing both of these terms, and +dashboard +web achieves the same result. See https://answers.dynatrace.com/articles/111540/how-do-i-search-the-forum.html for more information about search operators and syntax.