How to search in the wiki?

So far I saved several interesting links to topics in the wiki. All this links I found here

However, how can a search for a certain topic in the wiki? For example I want to know how to make a portable installation.

I less interested in the link to this information (I appreciate if I get it) but more on learning how to find myself topics in the wiki.

Here’s the search page for the Document Foundation wiki:

The Online Help for LibreOffice is stored in another instance of MediaWiki. Here’s the search page for that resource:

@qubit1 - Thanks for the links. Saved for usage!