| back pain |
|
Find abstracts that contains one of the words |
| pain* |
|
Find rows that contain words such as "pain", "painful", "paint" etc. |
| +back +pain |
|
Search for abstracts that contains both of the words |
| +back -pain |
|
List abstracts that contains the word "back" but does not contain word "pain" |
| ~back +pain |
|
Find rows that contain the word "pain", but if the row also contains the word "back", rate it lower than if row does not |
