Help on search

AND by default, eg. [ cats dogs ] will search pages talking of cats and dogs in the same page.
The double quotes (") allow you to search an exact phrase, respecting all caracters including spaces.
The MINUS (-) forbids a word, eg [ dogs -cats ] returns all pages with dogs but no cats inside the text. you can add a MINUS (-) before a sentence with double quotes ("), like -"white cats".
The search engine doses not care about the case of your text; you can select the information you are lokking in.