The search service needs to know how to separate words and numbers to find exactly what you want on the Internet. You can separate words using white space and tabs. You can link words and numbers together into phrases if you want specific words or numbers to appear together in your result pages. You can also create phrases using punctuation or special characters such as dashes, underscore lines, commas, slashes, or dots. The dashes link the numbers together as a phrase.
All searches are case insensitive and accent insensitive.
The only time that case is important is when using quotation marks in your search.