multiple key word count query problem

[Tommy Chheng]

I have a simple word count view defined as:
--------
function(doc) {
  if(doc['couchrest-type'] == 'NsfGrant'){
    var words = doc['abstract'].split(/\W+/);
    words.forEach(function(word){
      if (word.length > 1) emit([word, doc['_id']],1);
    });
  }
}
function(keys, values, rereduce) {
  return sum(values);
}
--------
where the key's first parameter is the word and the 2nd parameter is  
the document_id.

so i can do a query like this to get all the documents with the word  
"the" correctly.
http://localhost:5984/nsf_grants/_design/NsfGrant/_view/by_word_doc_count?startkey= 
["the"]&endkey=["the",{}]&group_level=2

I'm having trouble doing queries on the 2nd parameter, how can i find  
all the words in a particular document?
I tried
http://localhost:5984/nsf_grants/_design/NsfGrant/_view/by_word_doc_count?key= 
[null,"0808605"]&group_level=2
which gives nothing(thinking that null would match all words)
and
http://localhost:5984/nsf_grants/_design/NsfGrant/_view/by_word_doc_count?startkey= 
[null,"0808605"]&endkey=[{},"0808605"]&group_level=2
which gives all results. Why is this?

Thanks,
Tommy