[Bug] the search function is broken again! 🤬 Can't find anything with just two characters. Gotta be three or more. 🙄

### What happened?

no work:
where_document = {"$contains": "椎本"}
results = collection.get(
    limit =10,
    where_document=where_document
)
it work:
where_document = {"$contains": "腰椎本"}
results = collection.get(
    limit =10,
    where_document=where_document
)

### Versions

chromadb=0.6.3,Python 3.10.5,windows10

### Relevant log output

```shell

```