Search form/engine

[eluser]someone [/eluser]
I change like to or_like now, and there are more results if I search for only one word -> 'This', 'is', 'text', 'of', 'word'.

If I search for more words like 'This is' or something else, there are no results. Do I have to explode words and then search for each word?

Thanks! :-)