Two tips about Index Service(Filters And Exception-word lists)

Indexing Service comes with filters for

l         Documents created by Microsoft Office applications

l         HTML documents

l         Text documents

l         Internet mail and news documents 

Filters for documents produced by other applications may be available from the software vendors. Contact the software vendor for information about their filters.

Exception-word lists are text files named Noise.xxx, where xxx is a three-letter extension that indicates the language of the list.

You can search all the noise.xxx file in your operating system.

Maybe they are located at:

C:\WINDOWS\system32\ noise.chs

C:\Program Files\Microsoft SQL Server\MSSQL\FTDATA\SQLServer\Config\ noise.chs

Etc.

Things like 'a b c d e f g h i j k l m n o p q r s t u v w x y z after all......' are exception-words.

And you can define your own exception-word list as you expected.