OSX High Sierra: Finder search problems

In my iMac the Finder is not working as with preceding versions.

Now when I search files in a folder, the Finder is not able to search in all subfolder.

Just for example:

Find type of Image pointing in Folder A that contains 3 sub-folders sub0, sub1 and sub2.

Now the finder is not more able to show images into the 3 sub-folder.

Someone has a solution to this issue ?