Indexed and crawled filed does not show in search results.

Hello,

All started when I wanted to add more fields to property restrictions in advance search mode.

I created a filed under a document library and activated full crawl.

For the advance search I did all as described here.

The search didn't work, so I started to do a little drill down. I checked metadata properties, the filed is crawled and mapped, and I do get an announcement that some documents are using this property. 

Nonetheless, I cannot find any document by looking for this property not only in advance search but in the general search. If I'm looking for other properties of the same document I get the results. 

Any ideas?

Thank you