Wordpress Plugin or plugin modification

I am looking for a wordpress modification. the how is irrelevant to me as long as it works. There are two WP plugins I found neither goes as far as what I am looking for. those two are searchekko and **Search Engine query in Wordpress** What I want is this. Visitor makes a search query on search engine. searchengine sends him to my site normally he lands on my home page and 80% of the time he bonces off because it is not exactly what the visitor was looking for. I want to create a database with two columns column A contains keywords or phrases and column B contains the URL to the appropriate landing page. when a visitor reaches my site I want the search query intercepted and compared to column A and than forwarded to the appropriate landingpage in column B. in other words I have a website [login to view URL] customer queries for 1st birthday minnie mouse party theme. I want the visitor get redirected to [login to view URL] thereby giving my visitor exactly what he wants and increasing my chances to make the sale. delivery has to be in a form so that I, a technodummie, can install it into other wordpress sites.