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.