problem of natural search engine forum

Hello everybody ,

First, Happy new year for all.

I need your help : I've got a problem with the natural search engine for the forum and with all the website too.

how to improve natural search engine and the forum 's site?( 25000 comments in the forum)

How to improve natural search engine of the website in général ? (dolphin 7.1.4)

Thank you for your help. 

Search is not all that great with Dolphin and my experience with the google search module is not all that great either.  I have not tried using the Google tools/api directly, just the google search module.