diff --git a/src/datasources/product-api.ts b/src/datasources/product-api.ts
index c114bcf..5d4dafc 100644
--- a/src/datasources/product-api.ts
+++ b/src/datasources/product-api.ts
@@ -259,6 +259,22 @@ export class ProductAPI extends BaseSQLDataSource {
     });
   }
 
+  async searchByCopyright(name: string): Promise<Array<Product>> {
+    const query = sql.searchByFieldValue(25); // copyright
+
+    return this.knex
+      .raw(query, name)
+      .then((data) => data.rows.map((row) => this.createProductFromRow(row)));
+  }
+
+  async searchByReferences(name: string): Promise<Array<Product>> {
+    const query = sql.referenceProducts(); // ref1, ref2, ref3
+
+    return this.knex
+      .raw(query, [name, name, name])
+      .then((data) => data.rows.map((row) => this.createProductFromRow(row)));
+  }
+
   async getRelatedProducts(id: number): Promise<Array<Product>> {
     const ids = await this.knex
       .raw(
diff --git a/src/datasources/sql/products-sql.ts b/src/datasources/sql/products-sql.ts
index 6bf0fde..e120d2e 100644
--- a/src/datasources/sql/products-sql.ts
+++ b/src/datasources/sql/products-sql.ts
@@ -161,6 +161,14 @@ export function designerProducts() {
   );
 }
 
+export function referenceProducts() {
+  return (
+    baseQuery +
+    /* sql */ `
+    WHERE LOWER(products.ref1) LIKE ? OR LOWER(products.ref2) LIKE ? OR LOWER(products.ref3) LIKE ? ORDER BY products.inserted DESC`
+  );
+}
+
 export function keywordProducts(keywordId: number) {
   return (
     baseQuery +
diff --git a/src/resolvers/products-resolver.ts b/src/resolvers/products-resolver.ts
index ad63f6d..c1e1154 100644
--- a/src/resolvers/products-resolver.ts
+++ b/src/resolvers/products-resolver.ts
@@ -84,6 +84,8 @@ async function getProductsSearchResult(
   const prods = Promise.all([
     prodApi.searchByName(q),
     prodApi.searchByArtNo(q),
+    prodApi.searchByCopyright(q),
+    prodApi.searchByReferences(q),
   ]).then((d) => d.flat());
 
   return {