Boolean operators, AND, OR and NOT are used to compound keywords or a group of keywords when searching.
Boolean operators are unrelated to the position or the order of the keywords. Instead operates only based on whether the keywords exist or not.
A AND B
Search for the data with both A and B keywords, regardless of the position or the order of the keywords.
e.g.
printer AND head
A OR B (A blank is recognized the same as OR)
Search for the data with either A or B keywords, regardless of the position or the order of the keywords.
e.g.
Samsung OR Sony
television OR video
A NOT B
Search for the data with A but not B, regardless of the position or the order of the keywords.
