Hi Vietanh, you can try adding the user to Designer or Developer Group, if you haven't already added the user navigate to the composer > Security > Users Groups
Note: Though you can grant permissions on individual users and on individual entities in ThingWorx, but that won't be the recommended way to go and quite cumbersome to manage.
In case you don' t see these groups, it could be that they are hidden you can enable their visibility by going to Advanced tab and enable the
show system object like so
Navigate to the desired Group > Members > Edit Members then add all the required users as the member to the group
For your quick reference
The Developers group has read and update design time permissions (not delete) for all entities.
The Designers group does not have any default design or run time permissions.
You can check the doc on security and groups at User Groups
Hope this helps!