3 example url and search path didn't match
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Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://asdfyourwebapp/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename

Edit: You could also use the ListId managed property which is auto-populated. You can get the list GUID for the document library by going to the document library settings page and getting the id from the URL (it looks like something like feff2548-dd30-4372-80d1-c20a1a14b710) then your query would be ListId:feff2548-dd30-4372-80d1-c20a1a14b710

Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://asdf/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename

Edit: You could also use the ListId managed property which is auto-populated. You can get the list GUID for the document library by going to the document library settings page and getting the id from the URL (it looks like something like feff2548-dd30-4372-80d1-c20a1a14b710) then your query would be ListId:feff2548-dd30-4372-80d1-c20a1a14b710

Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://yourwebapp/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename

Edit: You could also use the ListId managed property which is auto-populated. You can get the list GUID for the document library by going to the document library settings page and getting the id from the URL (it looks like something like feff2548-dd30-4372-80d1-c20a1a14b710) then your query would be ListId:feff2548-dd30-4372-80d1-c20a1a14b710

2 added 350 characters in body
source | link

Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://asdf/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename

Edit: You could also use the ListId managed property which is auto-populated. You can get the list GUID for the document library by going to the document library settings page and getting the id from the URL (it looks like something like feff2548-dd30-4372-80d1-c20a1a14b710) then your query would be ListId:feff2548-dd30-4372-80d1-c20a1a14b710

Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://asdf/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename

Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://asdf/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename

Edit: You could also use the ListId managed property which is auto-populated. You can get the list GUID for the document library by going to the document library settings page and getting the id from the URL (it looks like something like feff2548-dd30-4372-80d1-c20a1a14b710) then your query would be ListId:feff2548-dd30-4372-80d1-c20a1a14b710

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source | link

Filter on the Path managed property. For example, if your list is located at http://yourwebapp/yoursite/yourweb/lists/yourlistthen your search would be Path:http://asdf/yoursite/yourweb/lists/yourlist*

Also, if you are using a certain content type in the list, you can use the content type filter. For example, ContentType:yourcontenttypename