If you enter a "-" (minus sign) in front of a search word, Magellan will exclude that word from the documents it returns. If you place "+" (plus sign) in front of a search word, you are asking Magellan to make sure that all documents returned include the word. It will ignore such words as "the," "that," "for," and "in."
Note: When using the "+/-" options, treat the symbol as part of the word you want it to go to work on. Do not leave any space between the "+/-" symbol and the word.