javascript – Filter sharepoint list using multi line text field

I’m trying to filter a sharepoint list using ajax api.

So one of the filtered field is Multi line text field (FieldType.Note) , after performing request it throws an error telleing that the field can not be used in filter expression !

"{"error":{"code":"-1, Microsoft.SharePoint.SPException","message":{"lang":"fr-FR","value":"Le champ u00abu00a0Descriptionu00a0u00bb de type u00abu00a0Noteu00a0u00bb ne peut pas u00eatre utilisu00e9 dans lu2019expression de filtre des requu00eates."}}}"

Here is an example of my req :

"http://siteurl/_api/Web/Lists/GetByTitle('Test')/items?
 $filter=(substringof('searchText',Description))"