EDGAR Full-Text Search allows you to search the full text of all filings since 2001. 

CIK Lookup -If you are looking for filings for a particular company, it’s most efficient to search by company name, ticker symbol or central index key (CIK). The CIK is the identification number given to an individual, company, or government entity for filing purposes. You can lookup 

Company Search note that many companies have similar names, so CIK lookup is more efficient,