I am trying below search query to search document from specific library but now this library have nested folders where documents are kept , how to modify my query so it only search for documents (pdf,doc,xls) not show folders
query which i am using now
path:"https://Sharepoint.com/sites/Test1/Lib1*"
path:"https://Sharepoint.com/sites/Test2/Lib2*"
path:"https://Sharepoint.com/sites/Test3/LIb3*"
path:"https://Sharepoint.com/sites/Test4/Lib4*"