Accrue considers each word evidence of your subject, and gives documents a higher score when more evidence exists. You can also double quote the search word to indicate this rule. You can also use a single quote to indicate this rule. To use a word operator, enter the operator first, then the word. You may combine word operators with word group operators.
Modifiers modify the operator search rule, generally adding an additional level of detail.
Use them to increase the accuracy of your queries. The modifier is placed directly in front of the word or operator.