Google-search – Filter or sort Google search results by “number of posts”

You could try using a Google Search instead for this...

To limit the results to threads in a parent forum (e.g. in this case Picasa), use site:google.com/support/forum/p/Picasa/thread.

To limit the results to a specific sub-forum, you could add the breadcrumbs that appear on each page to your search query. For example: "Help forum > Picasa > Picasa Web Albums".

To order by the date posted, click Show Search Tools, and choose Latest. This will order the posts with the newest ones at the top.

If I understand your question correctly, this can be achieved using quotes and wildcards. So something along the lines of searching "http://*keyword*.*" for a domain or "http://*keyword*.example.com" for a sub-domain of example.com.

You could simply use "http://*keyword*" to get as comprehensive results as possible.

(For completeness' sake, you must include the quotation marks, they limit it to "exactly this phase" while the asterisks can represent a character or number of characters.)

Hope that helps.