为什么Google不会在页面上对某些字词进行索引？

I've created a program in Delphi that uses Google's AJAX Search API to evaluate search phrase occurrences on specific sites, mine included. What surprised me was it doesn't appear Google is indexing some words on my pages, or I am forming my search queries via the API incorrectly. For example the search I've created a program in Delphi that uses Goog