query for specific directory (no subdir files)

[dppdppd]

my directory structure is something like this:

reference ├── bookmarks │   ├── 2019 │   ├── 2020 │   ├── 2021 │   └── 2022 ├── annotations │   ├── articles │   └── books ├── attachments

Is it possible to query for files that are in reference/ and not in any subdir?

[hasu]

It should be possible at least by explicitly excluding all the subdirectories:

path:(Reference AND NOT (Bookmarks OR Annotations OR Attachments))

[dppdppd]

Got it. Thanks.