Advanced recherche in windows 7 for seulement dossier names

[Clippy]

My dossier structure is like this:

**70-515**\Chapter01\Lesson1-Exercise1-Completed-CS

**70-515**\Chapter01\Lesson1-Exercise1-Completed-VB

Je veux search and supprimer all **VB** dossiers(including fichiers inside them) inside **70-515** root dossier.

But I cannot use Windows 7 search filters correctly, J'ai essayé the following searches and none dum a fonctionné correctly

"Dossier: vb" , "Dossier: *vb" ,....

I encore have a lot of dossiers remaining.

[Clippy]

Try: `foldername:vb` or `kind:folder name:vb`.