Resplin, thanks for your reply but our problems remains.
We are searching using the text box in the upper right corner in the Alfresco Explorer window.
When we use the sintax "name:server" no documents are returned.
When we simply use the word "server" the documents containing the word server in the file name or in the contents are returned.
When we simply use the word "server" and select the "file names only" in the list box on the left of text box, only the documents containing the word server in the file name are returned.
Using the logical operator AND, the problem is that the word "AND" is treated as a normal word !
Searching for "server AND cluster", Alfresco returns all the documents tha have the word "server" OR the word "cluster" OR the word "AND" in the file name or in the contents.
Selecting the "file names only" in the list box, we can restrict the research only to filenames but the "AND problem" remains !