update markdown

Author: Ziqun Ye

ai_services/semantic_search/Use_of_Cohere_embed_models_for_Semantic_Search_in_OCI_OpenSearch.ipynb

@@ -10,7 +10,9 @@
     "### Prerequesites\n",
     "- You have a Running Instance of OCI Search\n",
     "\n",
-    "To check how to spin up an instance of OCI search, see [Search and visualize data using OCI Search Service with OpenSearch](https://docs.oracle.com/en/learn/oci-opensearch/index.html#introduction)"
+    "To check how to spin up an instance of OCI search, see [Search and visualize data using OCI Search Service with OpenSearch](https://docs.oracle.com/en/learn/oci-opensearch/index.html#introduction).\n",
+    "\n",
+    "Check [this link](https://lucene.apache.org/core/8_9_0/core/org/apache/lucene/codecs/lucene87/package-summary.html#package.description) to learn some basic concept of terms used in OpenSearch."
    ]
   },
   {
@@ -188,7 +190,10 @@
    "metadata": {},
    "source": [
     "\n",
-    "A new query coming in, first calcualte the embedding vector."
+    "A new query coming in, first calcualte the embedding vector and then search.\n",
+    "\n",
+    "- `k`: the number of neighbors the search will return\n",
+    "- `size`: (required) how many results the query actually returns. The plugin returns k amount of results for each shard (and each segment) and size amount of results for the entire query. The plugin supports a maximum k value of 10,000."
    ]
   },
   {
@@ -200,7 +205,14 @@
     "query_vector = oci_embedings.embed_query(texts=\"how to build the html documentation\")\n",
     "query = {\n",
     "    \"size\": 2,\n",
-    "    \"query\": {\"knn\": {VECTOR_1_NAME: {\"vector\": query_vector, \"k\": 2}}},\n",
+    "    \"query\": {\n",
+    "        \"knn\": {\n",
+    "            VECTOR_1_NAME: {\n",
+    "                \"vector\": query_vector, \n",
+    "                \"k\": 2\n",
+    "            }\n",
+    "        }\n",
+    "    },\n",
     "}\n",
     " \n",
     "response = es.search(body=query, index=INDEX_NAME)  # the same as before\n",