Find stored procedure by name

Assuming you're in the Object Explorer Details (F7) showing the list of Stored Procedures, click the Filters button and enter the name (or partial name).

You can use:

select * 
from 
   sys.procedures 
where 
   name like '%name_of_proc%'

if you need the code you can look in the syscomments table

select text 
from 
    syscomments c
    inner join sys.procedures p on p.object_id = c.object_id
where 
    p.name like '%name_of_proc%'

Edit Update:

you can can also use the ansi standard version

SELECT * 
FROM 
    INFORMATION_SCHEMA.ROUTINES 
WHERE 
    ROUTINE_NAME LIKE '%name_of_proc%'