[Plugin: Search Engine] Results too broad & noindex not working

I really like how this plug in is working but I have 2 issues.

1) Is there anyway to make the search less broad? For example, a search for “rice” also returns results for “price”

2) I am trying to exclude a block of text from my results. I added class”noindex” to it but it still shows up in the description under the result. Does the pluging also use meta tag description for this? I just want to the result description to be the content of the page.

Thanks.