RAG tu A den Z: Xay dung Knowledge Base voi ChromaDB

## RAG la gi?

Retrieval Augmented Generation ket hop: - Retrieval: Tim kiem tu knowledge base - Generation: Tao cau tra loi tu LLM

## Setup ChromaDB

```python import chromadb client = chromadb.Client() collection = client.create_collection("docs") ```

## Index va Query

```python collection.add(documents=["doc1", "doc2"], ids=["1", "2"]) results = collection.query(query_texts=["search"], n_results=2) ```

## Production Tips

1. Chunking documents 2. Metadata filtering 3. Reranking results