| gap |
Search for data that contains both search terms (expressions). |
lung cancer |
| | |
Search for data that contains at least one of the two search terms (expressions). |
lung | cancer |
| ! |
Exclude data that contains the search term following "NOT". |
!lung cancer |
| [] |
Search for data that exactly matches the phrase within square brackets.
ex) iupac name search, long sentence search |
[lung cancer] |
| () |
The operator with the highest precedence. |
(bio (lung | cancer)) |
| * |
Search for data that contains zero or more arbitrary characters in place of the asterisk (*) in the search term. |
canc* |
