Pierre,
Sorry to say, but your search engine on this forum sucks! Most of the time it returns a search attempt with "The following words in your search query were ignored because they are too common words"! BS, just show the recent results. If Google did this, they would be out of business very soon.
No wonder people post multiple topics on the same subject, because they can't find results due to the lousy search engine.

I know and you're right but it's a real work to manage it with small words and I have other priority !!!

PW