diff --git a/libs/event-emitter/src/issues/issues.controller.ts b/libs/event-emitter/src/issues/issues.controller.ts
index 608f21e..48abec3 100644
--- a/libs/event-emitter/src/issues/issues.controller.ts
+++ b/libs/event-emitter/src/issues/issues.controller.ts
@@ -11,6 +11,22 @@ export class IssuesController {
     return await this.issuesService.find(params);
   }
 
+  @Get('find-from-root/:id')
+  async getIssuesFromRoot(
+    @Param('id') id: number,
+  ): Promise<RedmineTypes.Issue[]> {
+    const rootIssue = await this.issuesService.getIssue(id);
+    const res = await this.issuesService.getIssuesFromRoot(rootIssue);
+    return res;
+  }
+
+  @Post('find-from-merged-trees-and-query')
+  async findFromMergedTreesAndQuery(
+    @Body() params: any,
+  ): Promise<RedmineTypes.Issue[]> {
+    return await this.issuesService.mergedTreesAndFind(params);
+  }
+
   @Get(':id')
   async getIssue(@Param('id') id: number): Promise<RedmineTypes.Issue> {
     return await this.issuesService.getIssue(id);
diff --git a/libs/event-emitter/src/issues/issues.service.ts b/libs/event-emitter/src/issues/issues.service.ts
index 2cc5ef1..8b03fbf 100644
--- a/libs/event-emitter/src/issues/issues.service.ts
+++ b/libs/event-emitter/src/issues/issues.service.ts
@@ -10,6 +10,7 @@ import nano from 'nano';
 import { UNLIMITED } from '../consts/consts';
 import { GetParentsHint } from '../utils/get-parents-hint';
 import { TreeIssuesStore } from '../utils/tree-issues-store';
+import { FlatIssuesStore } from '../utils/flat-issues-store';
 
 export const ISSUE_MEMORY_CACHE_LIFETIME = 30 * 1000;
 const ISSUE_MEMORY_CACHE_AUTOCLEAN_INTERVAL = 1000 * 60 * 5;
@@ -18,6 +19,12 @@ export namespace IssuesServiceNs {
   export type IssuesLoader = (
     ids: number[],
   ) => Promise<Record<number, RedmineTypes.Issue | null>>;
+
+  export type TreesAndQuery = {
+    rootIds?: number[];
+    rootIssues?: RedmineTypes.Issue[];
+    query?: nano.MangoQuery;
+  };
 }
 
 @Injectable()
@@ -176,4 +183,43 @@ export class IssuesService {
     await treeIssuesStore.fillData(loader);
     return treeIssuesStore.getIssuesWithChildren();
   }
+
+  async getIssuesFromRoot(
+    rootIssue: RedmineTypes.Issue,
+  ): Promise<RedmineTypes.Issue[]> {
+    const treeStore = new TreeIssuesStore();
+    treeStore.setRootIssue(rootIssue);
+    const loader = this.createDynamicIssuesLoader();
+    await treeStore.fillData(loader);
+    return treeStore.getFlatStore().getIssues();
+  }
+
+  async mergedTreesAndFind(
+    query: IssuesServiceNs.TreesAndQuery,
+  ): Promise<RedmineTypes.Issue[]> {
+    const flatStore = new FlatIssuesStore();
+    const loader = this.createDynamicIssuesLoader();
+    if (query.query) {
+      const issues = await this.find(query.query);
+      issues.forEach((issue) => flatStore.push(issue));
+    }
+
+    const rootIssues = [];
+    if (query.rootIds) {
+      const issues = await this.getIssues(query.rootIds);
+      rootIssues.push(...issues);
+    }
+    if (query.rootIssues) {
+      rootIssues.push(...query.rootIssues);
+    }
+    for (let i = 0; i < rootIssues.length; i++) {
+      const rootIssue = rootIssues[i];
+      const issues = await this.getIssuesFromRoot(rootIssue);
+      issues.forEach((issue) => flatStore.push(issue));
+    }
+
+    await flatStore.fillData(loader);
+
+    return flatStore.getIssues();
+  }
 }