Came across a search tool "Power Search Tool" which will targets your search in specific ways and you don't have to remember the 20+ search operators or query types which Google or other search Engines have.

On installing the toolbar You can target your searches by the File Type,Image search, Title,Txt , URL Search etc.
All search with a click .. The Power Search Tool allows you to search 30 different search engines with a simple click of the mouse.

Check the below video for few examples or go Power Search Tool to download.

Video: Power Search Tool Instalation Intro

Pro:- If you are new to search or use basic keyword to search - this would be a great tool.
         Good tool for research...
Con:- You can't write complicated search strings