Boolean Searches: Boolean searches are helpful in restricting or expanding the documents returned by a search. The boolean operators supported by this search engine are: AND, NOT, OR. To use an operator, put it before the word it is to affect. (e.g. "fidel and castro not raul")
By default, if no boolean operators are used, a default operator of OR is assumed, so searching for "fidel castro" is equivalent to "or fidel or castro", which would return pages containing either the word fidel, the word castro, or both.
Case Sensitivity: Words entered in all lowercase are not considered to be case sensitive searches, so if you search for "fidel", the search engine will return pages containing "fidel", "Fidel", "FIDEL", etc... However, if you use case in your search, for example by searching for "fideL", the search engine looks specifically for "fideL", and will not return pages containing "Fidel", "fidel", or other case combinations.