Find Goal Keywords in Google Analytics

Method I

To view the keywords that achieve the Goal like E.g Keywords that help for website registrations, or achieve your Goal in analytics

GOTO

Content -> Overview -> All Pages

Here find the Goal URL i.e Thank you page URL that you used to target the Goal E.g /reg_thankyou.html. Click on the Thank-you page URL that shows in your analytics used for Goal by using “Secondary Dimension” find for keywords, here you can find the keywords that help to complete the Goal URL

Method II

In the "Advance Segment" of Google Analytics create a "New Custom Segment" here select the below option

Include -> Page -> Containing -> (your thank-you page)

If there is more than one registration page (or) thank-you page, you can follow the same above process in a "OR Statement" sothat you can view all the different registration, inquiry that happen all around the website in a single report

Error - Googlebot did not crawl your URL | Couldn’t communicate with the DNS server

1] DNS warnings or errors don’t affect Googlebot's ability.

2] You can use Fetch as Google to check if Googlebot can currently crawl your site.

3] If Fetch as Google returns the content of your homepage without problems, you can assume that Googlebot is generally able to access your site properly.

4] While most DNS warnings or errors don’t affect Googlebot's ability

5] Websites can be configured to respond to all subdomain requests. For example, the website at example.com can be configured to respond to requests for foo.example.com

6] User created sub-domain E.g http://www.example.com/username this may cause content to be duplicated unnecessarily across different hostnames, and it may also affect Googlebot’s crawling.

Ref - https://support.google.com/webmasters/bin/answer.py?hl=en&answer=2409681