Docs: fix retrieval docs. (#6633)

### What problem does this PR solve?


### Type of change

- [x] Documentation Update

docs/references/python_api_reference.md

@@ -892,11 +892,11 @@ The user query or query keywords. Defaults to `""`.
 
 ##### dataset_ids: `list[str]`, *Required*
 
-The IDs of the datasets to search. Defaults to `None`. If you do not set this argument, ensure that you set `document_ids`.
+The IDs of the datasets to search. Defaults to `None`. 
 
 ##### document_ids: `list[str]`
 
-The IDs of the documents to search. Defaults to `None`. You must ensure all selected documents use the same embedding model. Otherwise, an error will occur. If you do not set this argument, ensure that you set `dataset_ids`.
+The IDs of the documents to search. Defaults to `None`. You must ensure all selected documents use the same embedding model. Otherwise, an error will occur. 
 
 ##### page: `int`