data dictionary

select * from all_objects where object_name = 'COMPANY_SEARCH';

select * from all_objects where OBJECT_NAME = 'company_search'

Are you asking if the object is used in source code?

There is a DBA_DEPENDENCIES view:
select owner, name, type from dba_dependencies where referenced_name='COMPANY_SEARCH';

That will work if the procedure code doesn't use dynamic SQL.  IF if might then:
select name from user_source where upper(text) like '%COMPANY_SEARCH%';

i will second johnsone comment that while searching, you should query DBA_OBJECTS view.

So can you try the below 2 queries and you should get some output if such object exists from one of the queries.

select * from DBA_OBJECTS where object_name = 'COMPANY_SEARCH';  

--> this will help to get you the object if it is created with just company_search as the object name without quotes enclosing the name.

or

select * from DBA_OBJECTS where object_name = 'company_search';  --> this will help to get you the object if it is created with "company_search" as the object name with quotes enclosing the obect name to preserve its exact name in lower case letters.

This data is recorded in the systemtables and a full list can be found at:
http://www.techonthenet.com/oracle/sys_tables/

The techonthenet link above is  is not a full list of the dictionary tables.
In fact those aren't tables at all, but views.

It is however, as stated in the link, a set of commonly used views.
However the critical views have already been mentioned above.

if you're looking for a procedure called "company_search"  you can look in dba_procedures/all_procedures to see where it is defined whether it is a stand alone procedure or defined within a package.