Google Search

Earlier today I went to use google and one of the words I typed was "loose." When I got back my results, not only was the word "loose" in bold letters, but also the word "lose." I did not type in the word "lose." Why has Google decided to find instances where closely spelled words are accepted? Is it because too many people misspell words and Google has decided that anything close will do? I also did a search where I used the word "kook" (don't ask) and Google kept also finding webpages with the word "cook." It brought up thousands more entries than I needed, some of them not ever containing the original word I typed. It was really frustrating. Well, maybe just more perplexing.