IIS Search: Filter Asp Code In Abstracts

I'm having bit of a problem with a search engine. I got an intranet running in a company with IIS, Indexing Server and ASP. I've realized a search engine which also returns abstracts from the documents.

Most pages in the website are ASP pages. That doesn't mean that it draws all its contents from databases. I'm using ASP for other stuff as well. So they're basically documents, but with extras and hence ASP.

I excluded all sorts of things, e.g. "_" directories, like _vti and _private. Also directories like "include" are left out as people don't need to search for javascript code or css style sheets. Those are not relevant to the users. And finally I also give people the opportunity to make files non-searchable with a quick tag.

So what's the problem? When I perform a search e.g. for "body" (without the "" quotes) it would in this example return some results and one of those results got an abstract with evident pieces of ASP code. Code: