A PHP Error was encountered

Severity: Notice

Message: Undefined index: chuong-trinh-du-an-de-tai

Filename: controllers/Api.php

Line Number: 184

Backtrace:

File: /var/www/html/portal/vi/application/controllers/Api.php
Line: 184
Function: _error_handler

File: /var/www/html/portal/vi/application/controllers/Api.php
Line: 121
Function: _khcn

File: /var/www/html/portal/vi/index.php
Line: 315
Function: require_once