AND
operator2012 2013
2014
matches documents that contain any of the three
terms.
+2012 +2013
+2014
matches only documents that contain all three terms.
2012 2013
-2014
matches documents that contain 2012
or 2013
,
but only if they do not contain 2014
.
sample*
.
This means that you get different results than if you entered “sample”, +sample,
or *sample*.