| Examples: |
| africa | Chercher keywords (full text and metadata) for 'africa' |
| south africa | Chercher keywords for 'south' AND 'africa' |
| "south africa" | Chercher keywords for the phrase 'south africa' |
| africa* | Chercher keywords for the string 'africa' followed by 0 or more characters |
| africa? | Chercher keywords for the string 'africa' followed by a single character |
