About the ADC Search Powered by Google
Google does not use stemming or support wildcard searches. In other words, Google searches for exactly the words that you enter in the search box.
Since Google only returns web pages that contain all the words in your query, refining or narrowing your search is as simple as adding more words to the search terms you have already entered.
By default, Google only returns pages that include all of your search terms. There is no need to include and between terms. Keep in mind that the order in which the terms are typed will affect the search results. To restrict a search further, just include more terms.