Google-search – Increase font size in Google search results

Just wrap your query in double quote, that'll show you the results of the exact term you're searching for. So if you're trying to search one_two, you search for "one_two". that's all.

Update:
Check this page out for more searching tips of Google.

Google are currently releasing the new layout, so soon there will be no avoiding it. According to their blog:

It’s going out to Google.com users in the U.S. to start, and we want to get it to users in other languages and regions as soon as we can.

So for the moment you could use another region like http://www.google.co.uk but probably not for long. Since others will no doubt dislike it there will probably be some Greasemonkey or similar script to send it back to the old look eventually.