You can refine your search by combining search terms using 'logical operators'.
| ENTER AS | EFFECT |
|---|---|
|
heart failure |
documents containing either (or both) of the words |
|
+heart +failure |
documents containing both the words |
|
liver heart +failure |
documents containing liver and/or heart which must also contain failure |
|
"heart failure" |
documents containing both words as a phrase |
|
alcohol -wines |
documents containing alcohol but not wines |