DOC-11940 Vector improvements

Author: RichardSmedley

modules/howtos/pages/vector-searching-with-sdk.adoc

@@ -148,6 +148,10 @@ If no prefilter is specified, the server executes the vector query on all indexe
                                         .setMatch("primary").setField("color_wheel_pos"))))
 ----
 
+Note that `numCandidates` sets how many similar vectors are returned. 
+If it is not set, then the Cluster's default of `3` will be used --
+this corresponds with `k` on the Server side, for K-Nearest Neighbors.
+
 The prefilter can be any Search Query --
 from a simple match, as above, to a string query:
 
@@ -182,6 +186,19 @@ include::devguide:example$java/Search.java[tag=vector2,indent=0]
 
 How the results are combined (ANDed or ORed) can be controlled with `vectorSearchOptions().vectorQueryCombination()`.
 
+.Scoring for these hybrid search queries combines the boost multipliers to get to the final score.
+----
+hit_score = (query_1_boost * query_1_hit_score) + (query_2_boost * query_2_hit_score)
+----
+
+
+=== Query Methods
+
+As part of the Search service, you can use the same xref:full-text-searching-with-sdk.adoc#search-queries[Search query methods] as regular Searches.
+See a fuller list, with Vector properties, in the xref:cloud:search:search-request-params.adoc[Capella docs].
+
+
+
 
 
 ////