fix: search fix

internal/handler/search.go

@@ -203,11 +203,20 @@ func (h *SearchHandler) multiSearch(ctx context.Context, collections []string, q
 	prioritizeTokenPos := true
 	prefix, numTypos := fuzzinessKnobs(exact)
 	searches := make([]api.MultiSearchCollectionParameters, 0, len(collections))
+	// Merge-paginate: every sub-search fetches the first page*limit hits (page 1,
+	// a wide window) so the merged top page*limit is fully covered; we slice the
+	// requested page out after sorting below. Asking each collection for its OWN
+	// page N instead would miss globally-ranked hits and go blank past page 1
+	// (e.g. a sparse query whose few hits all sit in each collection's page 1).
+	window := page * limit
+	if window > 250 { // Typesense per_page ceiling
+		window = 250
+	}
 	for _, col := range collections {
 		queryBy := collectionQueryByFields[col]
 		weights := collectionQueryByWeights[col]
-		perPage := limit
-		pg := page
+		perPage := window
+		pg := 1
 		params := api.MultiSearchCollectionParameters{
 			Collection:       col,
 			Q:                stringPtr(query),
@@ -262,14 +271,18 @@ func (h *SearchHandler) multiSearch(ctx context.Context, collections []string, q
 		return allItems[i].score > allItems[j].score
 	})
 
-	// Paginate the merged results: since each sub-search already returned `limit`
-	// results for the given page, the merged set has at most 9*limit items.
-	// We take the top `limit` after sorting.
-	if len(allItems) > limit {
-		allItems = allItems[:limit]
+	// Slice the requested page out of the merged ranking. Collections hold
+	// disjoint documents, so totalFound (sum of per-collection founds) is the
+	// exact total and start past the end means the page is genuinely empty.
+	start := (page - 1) * limit
+	if start >= len(allItems) {
+		return []searchResultItem{}, totalFound
 	}
-
-	return allItems, totalFound
+	end := start + limit
+	if end > len(allItems) {
+		end = len(allItems)
+	}
+	return allItems[start:end], totalFound
 }
 
 // singleSearch searches a single collection.